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Dahlqvist, Hampus, and Tarek Laham. "Uppskattning av betalningsviljan för Peace & Love 2011." Thesis, Högskolan Dalarna, Nationalekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:du-21810.
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I denna uppsats skattas betalningsviljan hos besökarna på Peace & Love-festivalen år 2011. Med hjälp av enkätdata baserad på avslöjade och uttalade preferenser presenteras en regressionsanalys med olika oberoende variabler som karaktäriserar en festivalbesökare. Total budget är den beroende variabeln i regressionsanalysen och tolkas i uppsatsen som ekvivalent med besökarnas betalningsvilja. Analysen visar att män i genomsnitt spenderar 301 kronor mer än kvinnor, att turister i genomsnitt spenderar 1 124 kronor mer än en icke-turist samt att den genomsnittliga besökaren har en betalningsvilja på 4 183 kronor. Ett skattat konsumentöverskott har också värderats, vilket uppgick till 743 kronor per person och cirka 37 miljoner kronor totalt för de 50 000 festivalbesökarna. Uppsatsen tar inte hänsyn till de ekonomiska effekter som festivalen har på Borlänge som stad.In this thesis the willingness to pay among the visitors of peace & love-festival year 2011 is valued. With survey data based on revealed and stated preferences a regression analysis is presented with different independent variables that characterizes a festival visitor. Total budget is the dependent variable in the regression analysis and is, in this thesis, to be regarded as equivalent to visitors’ willingness to pay. The analysis shows that men in general spend 301 SEK more than women, tourists in general spend 1 124 SEK more than non-tourists and that the average visitor has a willingness to pay valued to 4 183 SEK. A consumer surplus has also been valued, which amounted to 743 SEK per visitor and around 37 million SEK in total for all 50,000 visitors. This thesis does not take into account the economic effects the festival holds on the city of Borlänge.
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Akrour, Riad. "Robust Preference Learning-based Reinforcement Learning." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112236/document.
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Les contributions de la thèse sont centrées sur la prise de décisions séquentielles et plus spécialement sur l'Apprentissage par Renforcement (AR). Prenant sa source de l'apprentissage statistique au même titre que l'apprentissage supervisé et non-supervisé, l'AR a gagné en popularité ces deux dernières décennies en raisons de percées aussi bien applicatives que théoriques. L'AR suppose que l'agent (apprenant) ainsi que son environnement suivent un processus de décision stochastique Markovien sur un espace d'états et d'actions. Le processus est dit de décision parce que l'agent est appelé à choisir à chaque pas de temps du processus l'action à prendre. Il est dit stochastique parce que le choix d'une action donnée en un état donné n'implique pas le passage systématique à un état particulier mais définit plutôt une distribution sur l'espace d'états. Il est dit Markovien parce que cette distribution ne dépend que de l'état et de l'action courante. En conséquence d'un choix d'action, l'agent reçoit une récompense. Le but de l'AR est alors de résoudre le problème d'optimisation retournant le comportement qui assure à l'agent une récompense maximale tout au long de son interaction avec l'environnement. D'un point de vue pratique, un large éventail de problèmes peuvent être transformés en un problème d'AR, du Backgammon (cf. TD-Gammon, l'une des premières grandes réussites de l'AR et de l'apprentissage statistique en général, donnant lieu à un joueur expert de classe internationale) à des problèmes de décision dans le monde industriel ou médical. Seulement, le problème d'optimisation résolu par l'AR dépend de la définition préalable d'une fonction de récompense adéquate nécessitant une expertise certaine du domaine d'intérêt mais aussi du fonctionnement interne des algorithmes d'AR. En ce sens, la première contribution de la thèse a été de proposer un nouveau cadre d'apprentissage, allégeant les prérequis exigés à l'utilisateur. Ainsi, ce dernier n'a plus besoin de connaître la solution exacte du problème mais seulement de pouvoir désigner entre deux comportements, celui qui s'approche le plus de la solution. L'apprentissage se déroule en interaction entre l'utilisateur et l'agent. Cette interaction s'articule autour des trois points suivants : i) L'agent exhibe un nouveau comportement ii) l'expert le compare au meilleur comportement jusqu'à présent iii) l'agent utilise ce retour pour mettre à jour son modèle des préférences puis choisit le prochain comportement à démontrer. Afin de réduire le nombre d'interactions nécessaires entre l'utilisateur et l'agent pour que ce dernier trouve le comportement optimal, la seconde contribution de la thèse a été de définir un critère théoriquement justifié faisant le compromis entre les désirs parfois contradictoires de prendre en compte les préférences de l'utilisateur tout en exhibant des comportements suffisamment différents de ceux déjà proposés. La dernière contribution de la thèse est d'assurer la robustesse de l'algorithme face aux éventuelles erreurs d'appréciation de l'utilisateur. Ce qui arrive souvent en pratique, spécialement au début de l'interaction, quand tous les comportements proposés par l'agent sont loin de la solution attendueThe thesis contributions resolves around sequential decision taking and more precisely Reinforcement Learning (RL). Taking its root in Machine Learning in the same way as supervised and unsupervised learning, RL quickly grow in popularity within the last two decades due to a handful of achievements on both the theoretical and applicative front. RL supposes that the learning agent and its environment follow a stochastic Markovian decision process over a state and action space. The process is said of decision as the agent is asked to choose at each time step an action to take. It is said stochastic as the effect of selecting a given action in a given state does not systematically yield the same state but rather defines a distribution over the state space. It is said to be Markovian as this distribution only depends on the current state-action pair. Consequently to the choice of an action, the agent receives a reward. The RL goal is then to solve the underlying optimization problem of finding the behaviour that maximizes the sum of rewards all along the interaction of the agent with its environment. From an applicative point of view, a large spectrum of problems can be cast onto an RL one, from Backgammon (TD-Gammon, was one of Machine Learning first success giving rise to a world class player of advanced level) to decision problems in the industrial and medical world. However, the optimization problem solved by RL depends on the prevous definition of a reward function that requires a certain level of domain expertise and also knowledge of the internal quirks of RL algorithms. As such, the first contribution of the thesis was to propose a learning framework that lightens the requirements made to the user. The latter does not need anymore to know the exact solution of the problem but to only be able to choose between two behaviours exhibited by the agent, the one that matches more closely the solution. Learning is interactive between the agent and the user and resolves around the three main following points: i) The agent demonstrates a behaviour ii) The user compares it w.r.t. to the current best one iii) The agent uses this feedback to update its preference model of the user and uses it to find the next behaviour to demonstrate. To reduce the number of required interactions before finding the optimal behaviour, the second contribution of the thesis was to define a theoretically sound criterion making the trade-off between the sometimes contradicting desires of complying with the user's preferences and demonstrating sufficiently different behaviours. The last contribution was to ensure the robustness of the algorithm w.r.t. the feedback errors that the user might make. Which happens more often than not in practice, especially at the initial phase of the interaction, when all the behaviours are far from the expected solution
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Clark, Michael D. "Eliciting preferences using discrete choice experiments in healthcare : willingness to pay, stakeholder preferences, and altruistic preferences." Thesis, University of Warwick, 2013. http://wrap.warwick.ac.uk/88792/.
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Chapter 1 of the thesis is divided into 5 sections. Section A begins by defining a Discrete Choice Experiment (DCE), and outlines the key stages involved in conducting a DCE. Sections B and C outline theories underpinning DCE analysis. Section B outlines the characteristics theory of demand, whilst section C, explains random utility theory (RUT), compensating variation (CV), marginal willingness to pay (MWTP), and willingness to pay (WTP) analysis. Section D of the thesis provides a review of the DCE literature. Section E outlines the research questions addressed in the thesis including calculating WTP and hypothetical bias; the description of the cost attribute; preference heterogeneity; and altruism. Chapter 2 shows how DCEs can be used to calculate WTP, using a DCE relating to Deep Vein Thrombosis (DVT). Chapter 3 uses data from a DCE applied to Menstrual disorder and Gynaecology patients. It evaluates an experimental method I developed to establish whether respondents might fail to factor in the monetary attribute into their DCE decision making, leading to hypothetical bias. Chapter 4 applies essentially the same DCE design but only analyses data from Gynaecology patients. Chapters 4-8 all use data obtained from a DCE relating to preferences for different allocation criteria for allocating kidneys for transplantation. Chapters 5 and 6 look at preference heterogeneity which is observable using interaction dummy variables (the issue of unobserved preference heterogeneity is considered in chapter 7). Chapter 5 establishes how marginal rates of substitution (MRS) differ between different respondent groups including renal patients, healthcare professionals, live donors / relatives of deceased donors, carers, and ethnic minority versus non-ethnic minority patients. Chapter 6 establishes how MRS differs between non-white ethnic minority patients versus other patients; South Asian patients versus other patients; and according to respondent gender. Chapter 7 of the thesis compares results from models which do not cater for unobserved preference heterogeneity, with results from models which do. Initially 2 basic models which do not cater for preference heterogeneity at all (because they do not include dummy variables) are applied including random effects logit and conditional logit. Then models catering for unobserved preference heterogeneity including Mixed Logit and a Latent Class Model (LCM) are used. Finally there is an analysis involving the application of conditional logit with interaction dummy variables. Chapter 8 of the thesis explores how preferences might differ according to how altruistic respondents are. It establishes how respondent preferences differ according to respondent self-disclosed perspective when answering DCEs. In other words whether they claimed to answer the DCE in terms of what would be best for me; what would be best for me and others; or what is best for others. Finally chapter 9 involves a discussion of the findings emerging from the thesis, and draws conclusions about the merits of material contained in it.
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Kaneko, Naoya. "Three essays on economic valuation of consumer preferences on genetically modified foods." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1127328876.
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Thesis (Ph. D.)--Ohio State University, 2005.Title from first page of PDF file. Document formatted into pages; contains xiv, 168 p.; also includes graphics (some col.). Includes bibliographical references (p. 161-168). Available online via OhioLINK's ETD Center
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Chen, Yun-Ju (Kelly). "Consumer preferences for wool production attributes." Diss., Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/1035.
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Bub, John L. "Balancing sea duty location preferences with assignment incentive pay." Monterey, California. Naval Postgraduate School, 2005. http://hdl.handle.net/10945/9966.
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MBA Professional ReportThe goal of sea pay has always been to motivate sailors to go to sea and to compensate the arduous nature of sea duty. This study will take sea pay one step further by analyzing sea pay as a location incentive pay. By offering a premium to sailors who choose less desirable sea duty locations, we hope to motivate more sailors to volunteer for these locations. This study will use data from the current location assignment incentive pay for overseas locations and the sea pay history to make a determination of the reaction of sailors to a location assignment incentive sea pay system.
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Rust, Jennifer, Kalie Heideman, and Elizabeth Hall-Lipsy. "Assessing the Factors Involved in Provider Preference and Willingness to Pay for Informational and Screening Services." The University of Arizona, 2012. http://hdl.handle.net/10150/614487.
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Class of 2012 AbstractSpecific Aims: The purpose of this study is to assess rural community members in Cochise County, Arizona, to determine if healthcare screenings and informational sessions are desired by the community members for chronic disease states, and from which healthcare providers the community members prefer to obtain these services. Identify which health professional rural members are most likely to seek for healthcare screening. Identify which health professional rural members are most likely to seek for healthcare informational sessions. Determine if rural community members are willing to pay for healthcare screening and informational sessions. Methods: This descriptive study obtained data through 350 questionnaires distributed during selected Cochise County community events in late 2011. Main Results: 341 surveys were completed. The majority of results favored physicians with 47.7% of the people stating they would very likely attend a health care screening conducted by a physician. 34.5% responded they would very likely attend an informational session conducted by a physician. Of the respondents willing to pay for health screenings, 63.9% would pay $30 or less. 70.9% stated they would not be willing to pay for an informational session. However, the majority of participants, 61.3%, indicated they would utilize pharmacists for OTC questions. Regarding questions about prescription medications, 43.4% would go to pharmacists, and similarly, 44% indicated they use physicians. Conclusions: As seen from the results, pharmacists are underutilized by rural community members; except for OTC questions. Respondents with higher levels of education were also more likely to prefer and attend events held by pharmacists.
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Dixon, Simon. "Exploring preferences for compulsory health programmes using willingness to pay." Thesis, University of Sheffield, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.489655.
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Sovern, Heather S. "Examining the relationships among core self-evaluations, pay preferences, and job satisfaction in an occupational environment." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/920.
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Weiß, Julia [Verfasser], Lucie [Akademischer Betreuer] Heinzerling, and Lucie [Gutachter] Heinzerling. "Therapy preferences in melanoma treatment - Willingness to pay and preference of quality versus length of life of patients, physicians, healthy individuals and physicians with oncological disease / Julia Weiß ; Gutachter: Lucie Heinzerling ; Betreuer: Lucie Heinzerling." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2021. http://d-nb.info/1231545844/34.
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Ryan, Patricia L. "THE WILLINGNESS TO PAY FOR THE DETECTION AND TREATMENT OF VULNERABLE PLAQUE RELATED TO HEART ATTACKS." UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_diss/535.
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Recent medical studies have led cardiologists to revise theories regarding the cause of heart attacks. Rather than a gradual clogging of the arteries, eruption of a vulnerable plaque is thought to be the cause of approximately 75% of all heart attacks. As a result, traditional risk factors are no longer sufficient indicators of who is at risk for a heart attack. Therefore, this research investigates the willingness to pay (WTP) for a new, hypothetical detection (screening) and treatment method for vulnerable plaque. For this study, two survey instruments were developed that take advantage of the visual and interactive aspects of the Internet. Individuals report their perception of heart attack risk both prior to and after receiving new information on who cardiologists currently believe to be at risk for a heart attack. In addition, respondents are provided with information about the effectiveness and risks associated with screening and treatment. Using webbased surveys, which follow a contingent valuation format, an iterative bidding process is used to elicit the respondents WTP for either the screening or treatment method. Internet, on-line surveys are often prone to coverage bias; however, the survey valuing screening (a simple blood test) used a Knowledge Networks panel and resulted in a sample of 268 adults that is essentially representative of the general population. The survey valuing treatment (a more invasive heart catheterization procedure) was administered only to individuals with doctor-diagnosed heart problems, who are presumably more familiar with these types of medical decisions, and resulted in a sample of 295 adults. The mean for screening is $69 and the mean WTP for treatment that is 85% effective is $5,816. A two-part model is used to identify the factors that influence WTP, as well as the decision to receive the screening/treatment. The data suggests that these factors vary across genders. The data obtained for this study demonstrate construct validity; therefore, the results may provide useful information for policy analysis regarding the screening and treatment of heart attack.
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Seshagiri, Raghavendra Madhavarao. "Household preferences and willingness to pay water services in Hyderabad, India." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614012.
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Moore, Matthew Luke. "BSE in North America consumer perceptions and willingness to pay for tested beef /." Online access for everyone, 2005. http://www.dissertations.wsu.edu/Thesis/Spring2005/m%5Fmoore%5F041405.pdf.
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Wu, Ka U. "Studying the relationship between color preference and willingness-to-pay price of Chinese consumers." Thesis, University of Macau, 2010. http://umaclib3.umac.mo/record=b2162010.
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Jobczyk, Krystian. "Temporal planning with fuzzy constraints and preferences." Thesis, Normandie, 2017. http://www.theses.fr/2017NORMC259/document.
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La planification temporelle constitue conceptuellement une partie du raisonnement temporelle et il appartient au domaine de recherche de l'intelligence artificielle. La planification temporelle peut être considérée comme une extension de la planification classique par les aspects temporels de l'action. La planification temporelle est généralement complété par des préférences ou des types différents decontraintes imposées à l'exécution des actiones. Il existe de nombreuses approches à ce problème. D'une part, il existe différents paradigmes pour la planification temporelle, par example: la planification par un recherche d'une solution optimale dans des graphes de planification (STRIPS), la planification via la satisfiabilité ou la planification pardes processus de Markov. Ces approches sont mutuellement incompatibles. D'autre part, la planification temporelle exige une sujet-spécification – comme il est défini d'une manière méthodologique. Selon cette situation, cette thèse vise à proposer une analyse approfondi de la planification avec des contraintes floues qui contient quelques remèdes à ces difficultés. À savoir, deux approches à la représentation et la modélisation de ces questions sont mises.Dans la première (chapitre 2, chapitre 3) - les relations floues d'Allen en tant que contraintes temporelles floues sont représentés par des normes de convolutions dans un espace de Banach des fonctions intégrables de Lebesgue. Cela nous permet de nous immergerles relations d'Allen dans les contextes computationnels de la planification temporelle (basée sur STRIPS et sur la procedure de Davis-Putnam) et d'élucider leur nature quantitative. Cette approche est développée dans un contexte des problèmes par systèmes multi-agents comme un sujet de cette approche. Dans les chapitres 4 et 5 les contraintes temporelles floues avec flou – introduit par préférences - sont représentées en termes logiques de la logique préférentielle de Halpern-Shoham. Cela nous permet d'adopter ces resultats dans une construction du contrôleur du plan. Cette approche est développée dans un contexte du problème du voyageur de commerce. Enfin, une tentative de réconcilier ces deux lignes de représentation des contraintes temporelles floues a été proposée dans le dernier chapitreTemporal planning forms conceptually a part of temporal reasoning and it belongs to research area of Artificial Intelligence and it may be seen as an extension of classical planning by temporal aspects of acting. Temporal planing is usually complemented by considering preferences or different types of temporal constraints imposed on execution of actions. There exist many approaches to this issue. One one hand, there are different paradigms to temporal planning, such as: planning via search in graphs (STRIPS), planning via satisfiability or planning in terms of Markov processes. These approaches are mutually incompatible. In addition, temporal planning requires a subject-specification as it is rather defined in a methodological way. On the other hand, temporal constraints are represented and modeled in different ways dependently on their quantitative or qualitative nature. In particular, Allen’s relations between temporal intervals – an important class of temporal constraints – do not have any quantitative aspects and cannot be considered in computational contexts. According to this situation, this PhD-thesis is aimed at the proposing a depth-analysis of temporal planning with fuzzy constraints which contains some remedies on these difficulties. Namely, two approaches to the representation and modeling of these issues are put forward. In the first one (chapter 2, chapter 3) – fuzzy Allen’s relations as fuzzy temporal constraints are represented by norms of convolutions in a Banach space of Lebesgue integrable functions. It allows us immerse Allen’s relations in the computational contexts of temporal planning (based on STRIPS and on DavisPutnam procedure) and to elucidate their quantitative nature. This approach is developed in a context of Multi-Agent Problem as a subject basis of this approach. In the second one (chapter 4, chapter 5) – fuzzy temporal constrains with fuzziness introduced by preferences are represented in a logical terms of Preferential Halpern-Shoham Logic. It allows us to adopt these result in a construction of the plan controller. This approach is developed in a context of Temporal Traveling Salesman Problem as a subject basis of this approach. Finally, an attempt to reconcile these two lines of representation of fuzzy temporal constraints was also proposed
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Cenador, Susanne Tábara. "The Effect of "Drought Tolerant" Plant Labeling on Consumers' Preferences and Willingness to Pay for Ornamental Plants." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7459.
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Utah’s water resources are endangered by low rainfall rates, high per capita water consumption and a strong projected increase of residents. The irrigation of ornamental plant landscaping is estimated to account for 60% of residential water use, and is, therefore, a target of education programs in the effort to promote water conservancy. The water-wise “Yellow Tag” program developed by the Utah Division of Water Resources seeks to provide retail nurseries with free tags for labeling plants which are considered low water use with the objective of promoting water conservation. The objective of this study is to determine consumer preferences for plants labeled with the Yellow Tag.
As a means of measuring consumer preference we use willingness-to-pay (WTP). We give participants the choice between daylily, spiderwort and neither. Choice alternatives differ in flower color, purported irrigation need, production location and price. The data for this study was collected through an online survey instrument applied to 463 participants residing in the state of Utah.
Our results show that consumers prefer daylilies labeled with the Yellow Tag, and dislike spiderwort labeled with a high irrigation need. Special preference for Yellow Tag labeled ornamentals was found for respondents who are female, living in single houses, are concerned about the price of water and are drought aware. We do not find a preference for flower color or production location. These promising results may encourage Utah governmental and education agencies to continue the Water-Wise program, expand educational programs to increase drought awareness and help retailers optimize their future product mixes.
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Vaníková, Pavlína. "Analýza preferencí pěstitelů energetických plodin pomocí mikroekonometrického modelu." Master's thesis, Vysoká škola ekonomická v Praze, 2010. http://www.nusl.cz/ntk/nusl-75064.
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This thesis deals with the economic and environmental problems of biofuels in the Czech Republic and abroad. The goal is retrieval and analysis of economic studies that address economic and environmental impacts associated with the introduction of biofuels policy. Individual economic studies on the environment that are at work that are evaluated by using biofuels policy of macroeconomic and microeconomic models. Results of studies show that the introduction of biofuels policy creates economic and environmental impacts such as deforestation, environment, prices, employment and competitiveness of farmers.
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Silva, Ana Carina Vieira da. "Integrating public preferences in biodiversity conservation decision-making: a choice-modelling approach." Doctoral thesis, ISA-UL, 2017. http://hdl.handle.net/10400.5/14959.
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Doutoramento em Alterações Climáticas e Políticas de Desenvolvimento Sustentável, especialidade em Ciências do Ambiente - Universidade de Lisboa: Faculdade de Ciências, Faculdade de Letras, Instituto de Ciências Sociais, Instituto Superior de Agronomia, Instituto Superior Técnico / Universidade Nova de Lisboa: Faculdade de Ciências Sociais e Humanas, Faculdade de Ciências e TecnologiaThe need to reverse current trends of biodiversity loss is acknowledged by a wide range of international scientific and political initiatives. Along with the scientific and political agenda, the protection of biodiversity has become an important issue in public opinion too. Nevertheless, general public concerns are not typically considered by decision-makers and conservation planning continues to emphasize only ecological concerns ignoring social considerations. But since public involvement is essential for the success of conservation initiatives we must start thinking on how to capture public concerns and preferences so that they can be posteriorly integrated in conservation decision-making. This was the starting point for the present dissertation. This dissertation proposes an economic valuation approach to capture public preferences regarding biodiversity conservation and to translate them into monetary values, so they can be later incorporated in decision-making to ensure a truly societal management. Using choice experiments method allows for a valuation approach focused on biodiversity roles biodiversity plays for human well-being (benefits) rather than on components, which should simplify the cognitive process of preference formation and translation into monetary values. Considering this main aim, four main research questions arose: 1) Is the public aware of biodiversity roles/benefits? 2) Can we translate public preferences for biodiversity roles into monetary terms through economic valuation? 3) Are public preferences affected by the excludability degree of biodiversity roles? and 4) Are public preferences for biodiversity roles influenced by environmental education and a close contact with some of its components? Research results show that the general public share interesting social representations of biodiversity and seems to choose conservation priorities rationally. Additionally, choice modelling seems to be an appropriate approach to capture and translate public preferences into monetary terms allowing for biodiversity decomposing in different roles (or benefits) perceived by the public
N/A
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Harper, James Wilkinson. "Stakeholder Perceptions and Preferences for Coral Reef Restoration and Sustainable Resource Management." FIU Digital Commons, 2014. http://digitalcommons.fiu.edu/etd/1486.
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The Florida Reef and associated human community form a unique socio-ecological system. While this system represents great value to society, it is exposed to high levels of vulnerability. Despite intense study of its elements, the system lacks conceptual integrity, its management is fragmented, and user valuation remains unclear. A survey using contingent valuation methods investigated stakeholders' attitudes and how much they are willing to pay for sustainable seafood, coral reef restoration, and research funding for coral reefs in southeastern Florida. Respondents expressed angst about climate change and reef conditions, and they connected reef degradation to land-based pollution and water quality. Regression analysis revealed status (income, education) as weak, indirect predictors of behavior, age as a moderating influence, and environmental and emotive factors as strong, direct predictors. One's relative attachment to ecosystems, such as coral reefs, is theorized as a motivation that displaces the expectations of traditional economic theory.
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Makweya, Lesiba Florah. "Consumers preference and willingness to pay for graded beef in Polokwane Municipality of Limpopo Province, South Africa." Thesis, University of Limpopo, 2019. http://hdl.handle.net/10386/3053.
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Thesis (M.Sc. ( Agricultural Economics)) --University of Limpopo, 2019The demand for animal products is projected to increase progressively due to extensive urbanization, rapid growth of human population and income dynamics. However, the evolution of food demand is strictly linked to the change in consumer preferences. Consumers around the world are progressively becoming more concerned and aware about food standards, quality and safety issues. The purpose of this study was to determine consumers’ preference regarding safe and quality beef and WTP for graded beef in Polokwane municipality. The research surveyed 150 consumers using a structured questionnaire to collect data on consumer characteristics and responses to different bid levels for graded beef. Analytical methods were descriptive statistics, Likert scales, contingent valuation method to evaluate respondents’ mean WTP for graded beef and logit model to determine the dependence of WTP on socioeconomic factors. Results showed that consumers prefer their beef tender, with less fat and bones and labelled with price, grade/class, size or quantity of the product and lastly quality inspection or certification indicator. Over half of the respondents (53%) were aware of grading or classification systems. The results further revealed that most respondents are willing to pay an increase of 16.04 % over the current price for beef. This could be an opportunity for investments in beef label industry. Consumer characteristics including age, income, gender and household size significantly influenced WTP for graded beef in Polokwane Municipality. Marketing strategies considered by beef product investors should target young, female and wealthier consumers. Grading with respect to quality attributes would make beef sales at differentiated prices possible. This will eventually enhance sales volume and returns for all stakeholders along the value chain
National Research Fund
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Luo, Jie. "Hispanic Consumers’ Preferences and Willingness-to-Pay for Grass-Fed Beef in Virginia." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/30254.
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The primary objective of this dissertation is to determine Hispanic consumers’ preferences and willingness-to-pay (WTP) for grass-fed beef. Two hundred and thirty-one Hispanic consumers in four experiment sites in Virginia (Galax, Roanoke, Richmond, and Blacksburg) participated in an experimental economics laboratory procedure. Taste tests and visual evaluations were conducted to understand Hispanic consumers’ sensory preferences for grass-fed beef in comparison to conventional grain-fed beef. A contingent valuation method, Multiple Price Lists (MPL) was used to measure Hispanic consumers’ WTP for grass-fed beef. In the study, MPL was put into a non-hypothetical environment due to real products, real money, and actual transactions involved.
A bivariate Probit model was estimated to determine Hispanic consumers’ visual and taste preferences for grass-fed beef and to explore the relationship between their expected and experienced quality of grass-fed beef. A two-step decision process examined Hispanic consumers’ WTP and investigated the factors influencing their valuations on grass-fed beef. Approximately 50% of Hispanic consumers sampled preferred grass-fed to conventional grain-fed beef steak and the vast majority of grass-fed preferring consumers were willing to pay a price premium for it. Hispanic consumers were able to distinguish the appearance and taste between grass-fed and conventional grain-fed beef steaks. A positive correlation between visual and taste preferences for grass-fed beef was captured.Ph. D.
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Balogh, Péter, Daniel Bekesi, Matthew Gorton, József Popp, and Péter Lengyel. "Consumer willingness to pay for traditional food products." Elsevier, 2016. http://dx.doi.org/10.1016/j.foodpol.2016.03.005.
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Reflecting the growing interest from both consumers and policymakers, and building on recent developments
in Willingness to Pay (WTP) methodologies, we evaluate consumer preferences for an archetypal
traditional food product. Specifically we draw on stated preference data from a discrete choice
experiment, considering the traditional Hungarian mangalitza salami. A WTP space specification of the
generalized multinomial logit model is employed, which accounts for not only heterogeneity in preferences
but also differences in the scale of the idiosyncratic error term. Results indicate that traditional food
products can command a substantial premium, albeit contingent on effective quality certification,
authentic product composition and effective choice of retail outlet. Promising consumer segments and
policy implications are identified. (authors' abstract)
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McDonald, Jennifer. "Factors influencing premiums on local wines: an exploratory assessment of Kansas wine." Thesis, Kansas State University, 2016. http://hdl.handle.net/2097/32727.
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Master of AgribusinessDepartment of Agricultural Economics
Vincent R. Amanor-Boadu
While understanding consumer decisions about food choices is complex, the nature of wines makes it even more difficult to decipher how consumers arrive at their choices. Given the perceived importance of "local", how willing are consumers to pay for locally-produced wine? And, what characteristics of the wine influence the premium that consumers pay for it? These are the two related questions that this research seeks to address. The research uses a case study approach to explore how five wine characteristics of local Kansas wine influence the premium consumers are willing to pay. The five characteristics are appearance, aroma, body, taste and finish. The study uses four pairs of wine in the following groups: sweet white, dry white, semi-sweet red and dry red. Each pair is made up of a Kansas wine and a non-Kansas wine. A very well-defined set of focus group participants were invited to taste these wine without knowing the identity of the wines and score them according to their characteristics and then provide an indication of how much they are willing to pay. The case results indicate that the focus group participants were willing to discount Kansas wines in all cases of the four pairs. The factors affecting the discount were finish for sweet white wines, appearance for sweet red wines, taste and aroma for dry white and dry red wines. The implication of this exploratory case study is that while most local residents proclaim their willingness to pay a premium for local wines, when tested against national or international competitors, consumers are unwilling to pay a premium for these local wines because the local wines lack the desired quality the international wines have. The information is important because it provides direction for an entrepreneur seeking to develop local wines to focus on understanding and addressing the characteristics which influence consumers' willingness to pay a premium even as she determines which particular wines current players in the local Kansas industry has the potential to be competitive if they address the characteristics upon which they are penalized by consumers. This, despite this being an exploratory case study, it provides important direction for entrepreneurial action.
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Rust, Jennifer, and Kalie Heideman. "Assessing the Factors Involved in Provider Preference and Willingness to Pay for Informational and Screening Services." The University of Arizona, 2012. http://hdl.handle.net/10150/623642.
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Class of 2012 AbstractSpecific Aims: The purpose of this study is to assess rural community members in Cochise County, Arizona, to determine if healthcare screenings and informational sessions are desired by the community members for chronic disease states, and from which healthcare providers the community members prefer to obtain these services. Identify which health professional rural members are most likely to seek for healthcare screening. Identify which health professional rural members are most likely to seek for healthcare informational sessions. Determine if rural community members are willing to pay for healthcare screening and informational sessions. Methods: This descriptive study obtained data through 350 questionnaires distributed during selected Cochise County community events in late 2011. Main Results: 341 surveys were completed. The majority of results favored physicians with 47.7% of the people stating they would very likely attend a health care screening conducted by a physician. 34.5% responded they would very likely attend an informational session conducted by a physician. Of the respondents willing to pay for health screenings, 63.9% would pay $30 or less. 70.9% stated they would not be willing to pay for an informational session. However, the majority of participants, 61.3%, indicated they would utilize pharmacists for OTC questions. Regarding questions about prescription medications, 43.4% would go to pharmacists, and similarly, 44% indicated they use physicians. Conclusions: As seen from the results, pharmacists are underutilized by rural community members; except for OTC questions. Respondents with higher levels of education were also more likely to prefer and attend events held by pharmacists.
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Loy, Beth A. "Willingness to pay for industrial recruitment : a look at local decision-maker activity versus citizen preference." Morgantown, W. Va. : [West Virginia University Libraries], 1998. http://etd.wvu.edu/templates/showETD.cfm?recnum=152.
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Thesis (M.S.)--West Virginia University, 1998.Title from document title page. Document formatted into pages; contains v, 75 p. : ill. Vita. Includes abstract. Includes bibliographical references (p. 51-54).
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Hartter, David L. "Understanding consumers' ornamental plant preferences for disease-free and water conservation labels." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/34538.
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Product labeling is increasingly used as a tool to differentiate products with public and private benefits that cannot be readily evaluated by a consumer at the time of purchase. Our research investigates how a labeling program may be applied in the sale of ornamental plants to address two key issues; plant disease and irrigation water use. A choice modeling survey was utilized to estimate consumersâ willingness to pay a premium for six ornamental plants with disease-free and/or water conservation certification labels. The results of the mixed logit models show consumers are willing to pay a premium for plants certified as disease-free and/or produced with water conservation practices. The results strongly suggest producers can recoup some of the costs of implementing water conservation measures such as water recycling and disease control measures amid regulatory and drought concerns. Our research also investigated consumersâ preferences for multiple third party certifying authorities and whether preferences for the labels varied among consumers. The results showed ornamental plant consumers did not reveal a preference for a particular certifying authority. The results are mixed as to whether willingness to pay for the labels varies among respondents. We show willingness to pay does vary among respondents for three of the plant models indicating preference heterogeneity.Master of Science
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Darby, Kimberly Jeanne. "Consumer Preferences for Locally-Grown Berries: A Discrete Choice Model Estimating Willingness-To-Pay." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1392043198.
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Chapelain, Amandine. "Hand preferences in bonobos (Pan paniscus) for a variety of actions : spontaneous daily actions (non-social and social), bimanual coordination (tube task), tool-use (termite fishing) and induced gestures (begging)." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/7273.
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The database on hand preferences in non-human primates provides inconsistent and inconclusive findings, and is plagued by gaps and methodological issues. I studied hand preferences in the bonobo, which is a very interesting model for investigating evolutionary hypotheses on human handedness. There are few previous data on bonobos and they are from small samples and for relatively simple tasks. I studied a large sample of 94 bonobos in three zoos and one sanctuary, on a variety of actions. Five studies were performed to record: 1. hand use for spontaneous daily actions (non-social). 2. hand use for the tube task , a task that requires a manipulative bimanual coordinated precise action. 3. hand use for using a stick as a probe ( termite fishing ). 4. hand use for spontaneous social actions and gestures, recorded during their social interactions (intra-specific) and during interactions with humans (inter-specific). 5. hand use for induced begging gestures (begging for food from the observer). The results show significant manual laterality in almost all the behaviours studied. The hand preferences were present on an individual basis. The numbers of right-handed and left-handed individuals were similar, indicating no group-level bias, for any of the actions studied. There was no significant effect of the settings, rearing history, sex and age (except in study 2 where adults were more right-handed than younger subjects). I examined different factors that have been proposed as selective pressures for the emergence of handedness. Laterality was influenced by: postural demands (posture, activity of the other hand), precision, grip type, manipulation or bimanual coordination, tool-use, throwing, communication. Notably, the laterality was very marked for the tube task , the termite fishing task and the begging experiment, which suggests that the factors involved in these tasks could be important factors regarding laterality.
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Kanya, Gladys Lucy Wanjiru. "Investigating the criterion validity of contingent valuation-willingness to pay methods." Thesis, Brunel University, 2018. http://bura.brunel.ac.uk/handle/2438/17210.
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With theoretical foundations in welfare theory, the cost benefit analysis (CBA) technique is a powerful tool for assessing benefits particularly where markets do not exist or would fail (for example due to the existence of public goods) or have become potentially politically excluded (such as the health sector). Unlike other economic evaluation techniques, costs and benefits are measured in monetary terms allowing for comparisons within and between different sectors of the economy for resource allocation decisions. Using contingent valuation (CV) techniques, people's preferences for goods are determined by finding out what they would be willing to pay (WTP) for specified benefits or improvements; or accept (WTA), as compensation for withdrawal or loss of benefit. While the use of WTP methods has grown in other sectors, the uptake in health has been limited. A long-standing criticism is that stated WTP estimates may be poor indicators of actual WTP, calling into question their validity and the use of such estimates for welfare valuation. The aim of this thesis is to investigate the criterion validity of CV-WTP studies. A four-pronged approach including critical appraisals of the available literature and evidence on criterion validity and empirical analyses was adopted. The thesis established the scarcity in criterion validity assessments, particularly in the health sector and that evidence on the criterion validity of CV-WTP is more varied than authors are presenting. The variety in the methods used to assess and report criterion validity assessments is demonstrated. Further, the impact of the analysis of hypothetical WTP on criterion validity assessments and conclusions thereof is demonstrated. The empirical analyses further demonstrate the differences in predictions and predictors of WTP analyses, discussing the effect of these on criterion validity assessments and conclusions. Finally, the thesis offers suggestions for the reporting of criterion validity assessments, in efforts to improve the method.
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Wen, Luo. "Research on consumer preference, attitude and consumption intention for modern wooden structures: Case-studies from Japan and China." Kyoto University, 2017. http://hdl.handle.net/2433/227642.
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Widyastuti, Hera. "Valuing motorcycle casualties in developing countries using willingness-to pay method : stated-preference discrete choice modelling approach." Thesis, University of Newcastle Upon Tyne, 2012. http://hdl.handle.net/10443/1446.
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Motorcycle ownership and use in developing cities in Asia, including Surabaya and Jakarta (Indonesia), Kuala Lumpur (Malaysia) and Bangkok (Thailand) have increased dramatically over the past few decades. With this high rate of growth, there is evidence of an increase in the number of motorcycle casualties. Currently, efforts to reduce road casualties in general, and to reduce motorcyclist casualties in particular, have attracted considerable attention in developing countries, especially where motorcycle casualties have risen rapidly, for instance, in Indonesia. Necessary road safety improvements will demand substantial funding which the respective local and regional authorities of the countries generally support. To provide information to policy makers, in particular on how much saving can be gained by implementing road safety improvements, it is very important to have an accurate technique for valuing a road casualty. Various techniques are available to value road casualties however the appropriate method will depend on the objectives and balancing conflicting objectives such as whether to maximise the country’s Gross Domestic Product (GDP) or strengthen social welfare. At present, most of the developing countries, including Indonesia, use the Gross Output method to value the casualties; the objective of this method is to maximise the GDP. On the other hand, most of the developed countries prefer to use the Willingness to Pay method, which combines welfare objectives with cost-benefit analysis. The cost-benefit analysis is needed on the valuation of safety improvement program. The Willingness to Pay method was devised to determine the value of preventing casualties and to strengthen the social welfare objectives. This research uses the Willingness to Pay method for valuing motorcyclist casualty costs. In order to investigate the similarities, differences and interaction between the two, the Gross Output method also is used to estimate the motorcycle casualty costs. The case study used for this research is Surabaya city in Indonesia where the number of motorcycle casualties has increased substantially since the early 1990s. This study identifies that the Discrete Choice Modelling technique is appropriate to put a value of the Willingness to Pay. The study also delivers a basic understanding of the relationship between social attitudes and motorcycle-related casualty reductions; it considers three casualty classes: slight, serious with no disability and serious with disability. The research produced statistically significant evidence suggesting that the older population is less likely to support investments to reduce casualties. However, the reverse is true for households with higher income and more children. Finally the Willingness to Pay method was shown to be a suitable technique to be used in developing countries to measure the value of motorcycle casualties. Key words: Motorcycle Safety Valuation, Willingness-to-Pay, Stated-Preference Surveys, Discrete Choice Models
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Bechtold, Kai-Brit [Verfasser]. "Consumers' Preferences and Willingness-To-Pay for Functional Dairy Products in Germany / Kai-Brit Bechtold." Kiel : Universitätsbibliothek Kiel, 2013. http://d-nb.info/1038412293/34.
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Boissonnet, Niels. "Une Approche des changements de préférence par la délibération partielle." Thesis, Paris 1, 2019. http://www.theses.fr/2019PA01E006/document.
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L’objectif de cette thèse est d’enrichir la boîte à outils formelle et conceptuelle de la théorie des transformations de préférence. Pour ce faire, je modélise une procédure, la délibération partielle, par laquelle les agents changent l’ensemble des valeurs qui induisent leur relation de préférences. La délibération partielle se fonde sur l’idée qu’un tel changement résulte d’une prise de conscience (growing awareness) de ces certaines de ces valeurs. En prenant conscience de nouvelles valeurs, l’agent réalise qu’il adhère (respectivement qu’il n’adhère pas) à de mauvaises valeurs (resp. de bonnes), soit que les valeurs auxquelles il adhère sont contradictoires, soit qu’elles se renforcent mutuellement. Au travers d’une analyse critique de la littérature sur les transformations des préférences, l’introduction s’attache à dégager les principales motivations philosophiques de la délibération partielle. Le premier chapitre pose les fondations conceptuelles et formelles de cette procédure et présente, tout en les justifiant, les cinq grandes hypothèses psychologiques que suppose cette procédure. Le second chapitre axiomatise cette procédure et fournit une première interprétation du lien qu’elle entretient avec les changements de choix. Il spécifie de deux structures axiologiques sur laquelle se fonde cette procédure : une structure monotonique et une organisation partitionnelle. Le troisième chapitre, s’appuie sur la délibération partielle pour construire une théorie de la manipulation des préférences. L’idée est qu’un envoyeur choisit conjointement un projet et une stratégie de divulgation valeurs afin de manipuler les préférences d’un receveur. J’établis donc un lien entre le modèle développé au chapitre 2, je développe une théorie de la l’empathie imparfaite et de la divulgation séquentielle des valeursThis Ph.D. dissertation aims at providing new conceptual and formal tools in order to model preference changes. To do so, I model a mechanism that I refer to as partial deliberation. Partial deliberation is based on the idea that individuals change their preference by becoming aware of new values. Indeed, their awareness allows them either to reject values they were adhering to or to adopt new values. By critically analysis of the literature on preference changes and on rational choice theory, the introduction emphasizes the main philosophical issues of partial deliberation. The first chapter justifies the five psychological hypotheses on which this mechanism relies and discusses their relation with rational choice theory. The second chapter axiomatically deals with partial deliberation and it formalizes two specific structures : a monotonic structure and partitional structure.Then, the third chapter models a situation of preference manipulation, in which a sender jointly chooses a project and a disclosure strategy in order to manipulate the preference of a receiver. With this model, I account for imperfect empathy and sequential disclosure of values
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Mandlhate, Gaby de Nascimento. "REDUCING SURVEY HYPOTHETICAL BIAS THROUGH REVEALED BEHAVIOR PRIMING: A CASE OF STUDENT PREFERENCE FOR BEEF SERVED BY UNIVERSITY DINING." UKnowledge, 2019. https://uknowledge.uky.edu/agecon_etds/81.
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Economists are still searching for methods to reduce/eliminate Hypothetical Bias (HB). Different methods have been previously applied some with success and others without. In this study, we aimed to further test the cognitive dissonance approach (CD) through a learning design method to estimate the WTP for five beef attributes: Non-quality, Kentucky Proud, Appalachian, Grass Fed and a mix of 25% Non-quality and 75% Kentucky Proud, using a one and one half bounded model. To test the CD, 881 participants from the University of Kentucky, were randomly assigned to a real/hypothetical market for a battery recycling project at first and afterwards to a hypothetical market for beef. For the battery recycling, participants were asked to donate $1, $2 or $3. For the beef market, participants were randomly assigned to a $4 or $6 for the non-quality attribute patty. Participants assigned to a $4 were afterwards randomly assigned to a $4.5, $5, $5.5 or $6 and the ones assigned to a $6 were afterwards assigned to a $6.5, $7, $7.5 and $8 for the other attribute patties. From this study, we found that the learning design was effective in reducing the cognitive dissonance or conflicts between what consumers say and their actions.
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Meas, Thong. "THE EFFECTS OF COUNTRY OF ORIGIN IMAGE AND PATRIOTISM ON CONSUMER PREFERENCE FOR DOMESTIC VERSUS IMPORTED BEEF." UKnowledge, 2014. http://uknowledge.uky.edu/agecon_etds/27.
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Country of origin (COO) effect is a well-researched topic in the international marketing literature. It is well recognized that consumers are biased against imports, due to consumer ethnocentrism or patriotism tendency. However, the research on COO effects also suggests that consumers form certain image of origin countries (COO image) and favorable image, be it associated with the countries, their people, or general product quality, improves the evaluation and acceptance of foreign imports.
The publications related to COO effects which focus on consumer durables are abundant. However, the contrasting COO effects on food products are much less investigated. This study surveys British consumers’ preference for domestic versus imported beef. Like previous studies, a strong preference for domestic beef was found. Furthermore, individual characteristics which potentially influence such preference were examined. Using scores on consumer patriotism and COO image perception as interacting individual characteristics in the choice models, it was found that stronger preference against imports was linked to higher level of the respondents perceived patriotic sentiment toward their home country, while better COO image improved the likelihood of the foreign country’s beef being selected. Marketing and policy implications are discussed.
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Pons, Damien. "Mise en place d’enquêtes par préférences déclarées dans le cadre de projets d’étude relatifs au secteur des transports de personnes." Thesis, Lyon 2, 2011. http://www.theses.fr/2011LYO20142.
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Les enquêtes préférences déclarées (EPD) reposent sur des mises en situation hypothétiques. Face à une situation de choix construite de toute pièce par l’analyste, chaque répondant doit déclarer le choix qu’il ferait s’il y était confronté en réalité. Chaque situation se présente comme la combinaison de plusieurs paramètres. Face à chacune des diverses situations qui lui sont présentées successivement, l’enquêté va devoir faire le choix de celles lui convenant le mieux. Au fil du questionnaire, ses réponses révèleront l’importance qu’il donne à chaque paramètre et contribueront à une meilleure appréhension de ses préférences et de ses choix. Ce travail s’articule autour de trois études de cas mises en œuvre dans le cadre d’études menées par des opérateurs de transport (SNCF – thème : réforme de tarification sociale), des gestionnaires d’infrastructure (RFF – thème : effets du cadencement sur l’attractivité du train) ou des organismes de recherche (LET et PREDIT – thème : impact de politiques de rationnement du carburant sur la mobilité automobile). L’objet de ces études nécessitait la mise en œuvre d’enquêtes préférences déclarées. La conception, la mise en œuvre et l’analyse des EPD ont été réalisées dans le cadre de cette thèse avec un soucis permanent de contrôle de chacun des paramètres en vue de garantir la qualité des résultats obtenus.Selon les objectifs de l’étude, des traitements économétriques divers ont été utilisés pour analyser les données récoltées.Finalement, chacune de ces mises en place a contribué à renforcer notre conviction que les EPD constituent un outil complet. Ce travail contribue finalement, à son échelle, à crédibiliser un peu plus les méthodes de préférences déclarées et invite à repositionner cet outil d’analyse comme pivot de toute réflexion complexe dont le protocole est à réinventer lors de chaque construction, plutôt que tel qu’un procédé connu, livré clé en main, dont l’application suit une logique mécaniqueStated preference surveys are based on choice sets composed by the analyst and proposed to some respondents. Each situation of the choice set is the combination of pre-determined attributes. While declaring the choice they would make if they were confronted to the same situation in reality, respondents reveal their preferences and their perceptions of the attributes.This Phd work presents the results of three stated preference surveys applied in the camp of public transportation. All surveys form a part of more general research programs handled for the sake: of the French railway operator, known as the SNCF (2006/2007) ; of the French railway network administrator, called RFF (2008) ; and of the French research, experimentation and innovation program in land transport, named PREDIT (2010). The use of stated preference methodology was required in order to deal efficiently with the issues of each of those research programs (respectively treating of social pricing ; train supply policy ; fuel rationing policies). The conception, the implementation and the analysis of the surveys have all been carried out during this Phd work in order to warranty control of each parameter and thus high quality results.In accordance with program research objectives, different econometrics treatments have been implemented.This Phd work shows how stated preference surveys may deal with different complex issues and therefore promote the use of this method. Each of these studies have finally strengthened the conviction that stated preferences constitute an efficient and complete tool
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Seo, Youngme. "WHO CARES ABOUT SCHOOL QUALITY? THE ROLE OF SCHOOL QUALITY IN HOUSEHOLD PREFERENCE, SCHOOL DISTRICT CHOICE, AND WILLINGNESS TO PAY." Cleveland, Ohio : Cleveland State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=csu1246567102.
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Thesis(Ph.D.)--Cleveland State University, 2009.Abstract. Title from PDF t.p. (viewed on July 29, 2009). Includes bibliographical references (p. 175-183). Available online via the OhioLINK ETD Center and also available in print.
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Dupoux, Marion. "Structure of preferences, decision-making and the environment : theoretical and experimental approaches." Thesis, Paris 10, 2017. http://www.theses.fr/2017PA100012/document.
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Cette thèse vise analyser les déterminants (objectifs et subjectifs) à l’origine de l'hétérogénéité des évaluations de projets. Dans un premier temps, j'analyserai comment les quantités (objectives) sont incorporées dans l'analyse coût-bénéfice. Le premier chapitre principal traite de la manière dont l'analyse coût-bénéfice est affectée par la distribution temporelle des impacts considérée. À travers l'exemple du changement d'affectation des terres provenant de la production de biocarburants, il ressort que les décisions concernant les projets ayant des impacts environnementaux non constants dans le temps s'appuient sur des valeurs actuelles nettes biaisées, ce qui peut entraîner la mise en œuvre de projets en réalité non souhaitables ou la non-implémentation de projets réellement souhaitables. Ce travail est à la fois théorique et numérique.Ensuite, j'étudie le rôle de la structure des préférences sur la prise de décision individuelle dans un cadre individuel puis un cadre collectif. Au niveau individuel, nous développons un modèle théorique qui permet soit de la substituabilité, soit de la complémentarité entre les biens en fonction du contexte (revenu et qualité de l'environnement). Il en résulte que l'élasticité-revenu du consentement à payer marginal peut être négative dans un contexte de substituabilité inter-biens, ce qui contraste avec les modèles habituels qui ne permettent que des élasticités positives du revenu (le bien environnemental ne peut jamais être inférieur mais est toujours normal). Notre cadre théorique affecte également la façon dont la consommation et la qualité de l'environnement sont actualisées, ce qui est d'autant plus pertinent dans un contexte de chocs sur les revenus. Au niveau collectif, j’utilise une approche expérimentale pour analyser l'effet de l'interaction entre les individus ayant des structures de préférences différentes sur les contributions au bien public. Il en résulte que la substituabilité parfaite est associée à un plus grand nombre de passagers clandestins que la complémentarité. Cependant, une aversion à l'inégalité avantageuse émerge également des individus dont les préférences sont à l'origine d'une parfaite substituabilité vis-à-vis de ceux dont les préférences sont fondées sur la complémentaritéThis thesis aims at providing insights on the (objective and subjective) determinants of the heterogeneity of project evaluations. At first, I analyze how (objective) quantities are incorporated in the cost-benefit analysis. The first main chapter deals with the way cost-benefit analysis is affected by the time distribution of impacts considered. Through the example of land use change from biofuel production, I find that decisions regarding projects with non-constant environmental impacts rely on distorted net present values, which may result in the implementation of actually non-desirable projects or the non-implementation of actually desirable projects. This work is both theoretical and numerical.Second, I investigate the role of the structure of preferences, i.e. whether private goods and environmental goods are substitutable or complementary in providing utility, on individual decision-making in an individual framework and a collective framework. At the individual level (second main chapter), we develop a theoretical model which allows either for substitutability or complementarity depending on the context (income and environmental quality). It results that the income elasticity of willingness to pay can be negative in contexts of between-goods substitutability, which contrasts with usual frameworks which only allow for positive income elasticities (thus the environmental good can never be inferior but is always normal). Our framework also affects the way consumption and environmental quality are discounted, which is all the more relevant in the context of income shocks. At the collective level (third main chapter), we use an experimental approach to analyze the effect of the interaction between individuals with different structures of preferences on contributions to the public good. It results that perfect substitutability is associated with more free-riding than complementarity. However, an aversion to advantageous inequality also emerges from individuals whose preferences underlie perfect substitutability towards those whose preferences are based on complementarity
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Ouattara, Aboudou. "La structure par terme du taux d'escompte psychologique : estimation et incidences sur les préférences face au risque et sociales." Thesis, Paris 9, 2015. http://www.theses.fr/2015PA090026/document.
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La théorie de l’utilité actualisée proposée par Samuelson (1937) est un des paradigmes dominants en économie et en gestion particulièrement en finance où elle sert de socle, entre autres, au Modèle Intertemporel d’Equilibre des Actifs (ICAPM) et à sa version incluant la consommation (ICCAPM). En dépit de cette place, sa validité pour expliquer les préférences temporelles des individus a été questionnée dans des travaux de recherche récents ouvrant la voie à des amendements et à la remise en cause de ce cadre d’analyse. Ces travaux ont introduit, entre autres, le concept de structure par terme du taux d’escompte psychologique. La littérature a proposé sept alternatives à la fonction d’escompte exponentielle contenue dans la version initiale de la théorie de l’utilité actualisée. Il s’agit des fonctions d’escompte de Hernstein, de Harvey, Proportionnelle, de Laibson, de Rachlin, Hyperbolique et Hyperbolique généralisée.Faisant suite à ces travaux, nous avons initié une recherche visant à apporter une réponse à la question relatives aux caractéristiques de la structure par terme du taux d’escompte psychologique d’un individu et les facteurs qui expliquent sa différence d’un individu à l’autre ; ses liens avec les autres dimensions des préférences (face au risque et sociales) individuelles sont explorés par la suite. Il s’est agi d’identifier parmi ces fonctions celles qui sont cohérentes avec les préférences individuelles observées, d’estimer les paramètres associés, d’étudier la cohérence des préférences temporelles d’un individu. Elle s’appuie sur les données issues d’une étude expérimentale basée sur dix huit arbitrages inter-temporels, quatre arbitrages de loteries, le jeu du dictateur, le jeu de l’ultimatum et le jeu de confiance.L’analyse des données a permis de confirmer les résultats précédents sur la violation de la constance du prix psychologique du temps, la cohérence par domaine des préférences temporelles, d’établir que la population étudiée est caractérisée par une hétérogénéité par rapport à la forme de la structure par terme du taux d’escompte psychologique. Les individus sont caractérisés par une fonction d’escompte psychologique de Hernstein, hyperbolique généralisée ou de Laibson. Nous avons trouvé que les caractéristiques démographiques, l’environnement social et l’orientation temporelle expliquent peu les différences de structure par terme de taux d’escompte psychologique. Les différences de niveaux d’application (dimension des traits de personnalités) sont les principaux déterminants de la différence de structure par terme de taux d’escompte psychologique caractéristiques des préférences temporelles. Nous avons enfin établi qu’il existe une faible relation entre les paramètres des préférences temporelles, face au risque et sociales.L’ensemble de ces analyses nous ont permis de dériver des conclusions par rapport aux hypothèses de recherche que nous avons formulées et d’interroger la validité de chacune d’elles dans la perspective de déduire les réponses à la problématique de notre rechercheThe discounted utility theory proposed by Samuelson (1937) is one of the dominant paradigms in economics and management especially in finance where it serves as a basis of the Intertemporal Capital Asset Pricing Model (ICAPM) and its version including consumption (ICCAPM). Despite this place, its validity has a framework to explain individuals time preferences has been questioned in recents researches paving the way for amendments and questionings of this framework. Among others, these reseaches introduce the concept of term structure of psychological discount rate. Therefore, a part from exponential discount rate function, we find in the literature seven alternatives discount rate function : Hernstein, proportional, Laibson, Rachlin, Hyperbolic and generalized hyperbolic.Following this work, we initiated a research to provide an answer to the question on the characteristics and driving factors those explain its heterogeneity at an individual level. Thereafter, its relationship with other dimensions of individual preferences (risk and social interaction behavior) are explored. The purpose is to identify among them, the function that is consistent with the observed time preferences, to estimate the underlying parameters and to study the consistency of individual time preference. This research is based on the data collected by experimental study using eighteen time trade-offs, four lottery trade-offs, a dictator game, an ultimatum game and a trust game.Data analysis confirmed previous results on the violation of the time invariant of the psychological value of time hypothesis and established that the studied population is characterized by an heterogeneity with respect to the form of the term structure of psychological discount rate. Individuals are characterized by an Hernstein, Generalized hyperbolic or Laibson psychological discount rate. We found that demographic, social and temporal orientation have a weak link with the individual differences of the term structure of psychological discount rate. Application (a dimension of personality traits) is the most important driving factor of term structure of psychological discount rate forms heterogeneity. We finally established that there is a weak relationship between the parameters of time, risk and social preferences
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Fuller, Harry Matthew. "Farmland Conservation Easement Valuation Using an Attribute-based Choice Survey: Comparing Preferences within the United States, Georgia, Ohio and Maine." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/42761.
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Farmland preservation has long been viewed by the public as a worthwhile endeavor. A public program can be set up to bring willing buyers and sellers together to facilitate the transfer of development rights. The farmer is paid for the opportunity cost of forfeiting the development rights to the land, while the general public is taxed the amount of their total benefit created by the existence of farmland. Through the data from an attribute-based choice survey (conducted in four geographic areas) the willingness-to-pay (WTP) of the public to preserve farmland that exhibited certain attributes, was estimated. The attributes included different use (grain, hay, vegetable, pasture, forest), location (near urban), quality (prime), size (varied acreage relative to geographic area sampled), and cost (varied costs from $3 to $50) components.
Selection bias was tested for in order to confirm that the respondents are an unbiased representation of the geographic areas sampled. If selection bias was present, it would need to be corrected for in order to aggregate the survey results to the population of the geographic areas. Selection bias was tested for using a bivariate probit model with sample selection, a variation on the Heckman correction model. Selection bias was not significant, so the choice model was estimated using a probit model. The response was dependent on the use, location, quality, size, and cost components. Based on the parameter estimates, the geographic areas were compared using the scale parameter. A variation of the Swait and Louviere method was used to find the optimal scale parameter ratios between pair-wise geographic areas. Heterogeneity of the parameter estimates as well as heterogeneity of variances was tested. Prime farmland was significant and positive in all geographic areas, suggesting it should be included in the national ranking criteria for a farmland preservation program. WTP by household for each attribute was reported. Additionally, the WTP was aggregated to provide a hypothetical range of the monetary benefit farmland provides for the residents of each geographic area.Master of Science
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Ruokamo, E. (Enni). "Household preferences for energy goods and services:a choice experiment application." Doctoral thesis, Oulun yliopisto, 2019. http://urn.fi/urn:isbn:9789526221885.
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Abstract This thesis includes three studies on household preferences for energy goods and services. The first study examines determinants of households’ heating system choices using a choice experiment. The choice sets include six main heating alternatives (district heating, ground heat pump, exhaust air heat pump, solid wood boiler, wood pellet boiler, and electric storage heating) that are described by five attributes (supplementary heating systems, investment costs, operating costs, comfort of use and environmental friendliness). The results imply that hybrid heating appears to be accepted among households. The results also reveal differing preferences for the main heating alternatives and show that they are affected by demographic characteristics. The studied attributes also play a significant role when heating systems are being chosen. The second study is a methodological one that extends the analysis of the first study. The second study explores the effect of perceived choice complexity on the randomness of choices in choice experiments. The study investigates how different self-evaluated factors of choice complexity affect mean scale and scale variance. The findings suggest that perceived choice complexity has a systematic impact on the parameters of econometric models of choice. However, differences exist between alternative self-evaluated complexity-related covariates. The results indicate that individuals who report that answering the choice tasks is more difficult have less deterministic choices. Perceptions of the realism of home heating choice options also affect scale and scale variance. The third study utilizes the choice experiment to analyze households’ willingness to participate in demand side flexibility. The study examines whether individuals are willing to time their electricity usage and heating; whether they are interested in dynamic pricing contracts such as real-time pricing, two-rate tariffs, or power-based tariffs; and how emissions reductions affect their choices. The results indicate that households’ sensitivity to restrictions in electricity usage is much stronger than their sensitivity to restrictions in heating. Households also require compensation to choose real-time pricing over fixed fees. The findings suggest that room may exist for new dynamic electricity distribution contracts, such as power-based tariffs, in the market. Other value-creating elements besides monetary compensation also exist that could incentivize households to offer demand side flexibility because households value power system level reductions in CO2 emissionsTiivistelmä Tämä väitöskirja koostuu kolmesta tutkimuksesta, joissa tarkastellaan kotitalouksien preferenssejä energiahyödykkeitä ja -palveluita kohtaan. Ensimmäinen tutkimus keskittyy kotitalouksien lämmitysjärjestelmävalintoihin ja niitä määrittäviin tekijöihin. Tämä tutkimus on tehty valintakoemenetelmällä, jonka valintatilanteet sisältävät kuusi eri päälämmitysjärjestelmävaihtoehtoa (kaukolämpö, maalämpöpumppu, puulämmitys, pellettilämmitys, varaava sähkölämmitys ja poistoilmalämpöpumppu). Päälämmitysjärjestelmiä kuvataan viiden ominaisuuden avulla, jotka ovat tukilämmitysjärjestelmä, investointikustannukset, käyttökustannukset, käyttömukavuus ja ympäristöystävällisyys. Tulosten mukaan kotitalouksien preferenssit päälämmitysjärjestelmävaihtoehtoja kohtaan ovat vaihtelevia. Valintaan vaikuttavat sekä tarkastellut ominaisuudet että kotitalouden demografiset tekijät. Tulokset myös paljastavat, että kotitaloudet suhtautuvat myönteisesti hybridilämmitykseen. Toinen tutkimus on menetelmällinen, missä hyödynnetään ensimmäisen tutkimuksen aineistoa. Tämä tutkimus keskittyy yksilöiden kokeman vastaamisen vaikeuden vaikutuksiin valintakoemenetelmässä. Vastaamisen epätarkkuus tunnistetaan valintakoemenetelmässä skaalan ja skaalavarianssin avulla. Tutkimus tarkastelee, kuinka itsearvioidut vastaamisen vaikeutta mittaavat tekijät vaikuttavat keskimääräiseen skaalaan ja skaalavarianssiin valintojen ekonometrisissa malleissa. Tulosten mukaan koettu vastaamisen vaikeus vaikuttaa systemaattisesti ekonometrisen valintamallin parametreihin. Vastaamisen vaikeutta mittaavien tekijöiden välillä on kuitenkin eroja. Tuloksien perusteella vastaajat, jotka kokevat valintatilanteisiin vastaamisen keskimääräistä vaikeampana, tekevät satunnaisempia valintoja. Myös valintatilanteiden koettu realistisuus vaikuttaa skaalaan ja skaalavarianssiin. Kolmannessa tutkimuksessa arvioidaan kotitalouksien halukkuutta osallistua energian kysyntäjoustoon valintakoemenetelmällä. Tämä tutkimus selvittää ovatko kotitaloudet halukkaitta siirtämään sähkönkulutusta ja lämmitystä, ja kuinka kiinnostuneita he ovat dynaamisista sähkön hinnoittelusopimuksista kuten pörssisähkösopimuksesta, yösähkösopimuksesta tai tehoperusteisesta sopimuksesta. Lisäksi tutkitaan vaikuttavatko järjestelmätason päästövähennykset kotitalouksien valintoihin. Tulosten perusteella kotitaloudet suhtautuvat sähkönkulutuksen rajoituksiin selvästi negatiivisemmin kuin lämmityksen rajoituksiin. Kotitaloudet myös vaativat rahallista korvausta valitakseen pörssisähkösopimuksen kiinteähintaisen sopimuksen sijaan. Tulosten mukaan markkinoilla voisi olla tilaa uudenlaisille sopimustyypeille, kuten tehoperusteiselle vaihtoehdolle. Tulokset osoittavat, että kotitaloudet arvostavat järjestelmätason hiilidioksidipäästövähennyksiä. Täten rahallisen korvauksen lisäksi on olemassa myös muita arvoa luovia tekijöitä lisätä kotitalouksien osallistumista kysyntäjoustoon
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Drugova, Tatiana. "The Organic Wheat Market: Three Essays on Pricing, Consumer Segments, and the Importance of Labels." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7501.
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This dissertation aims to address issues related to supply and demand of organic wheat either as a commodity or contained in the final consumer products. Objectives for the first essay are to evaluate organic wheat price and premium risk, how it affects the profitability of organic wheat production, and examine whether hedging and forecasting can be used to manage the organic wheat price risk. A side objective is to apply and evaluate several data imputation methods to recover missing organic wheat price observations. Objectives for the second essay are to identify “very likely,” “likely,” and “unlikely” consumers of organic wheat products, examine the differences across the consumer groups to understand which sociodemographic characteristics and other factors drive demand for organic wheat products, and which product characteristics and labels are important to consumers. Objectives for the third essay are to obtain willingness to pay values for organic label alone, examine whether combining organic label with other labels (non-GMO, gluten-free, sugar-free or low-carb) is beneficial for consumers, and evaluate whether knowledge and familiarity with organic, wheat or gluten intolerance or avoidance, and other sociodemographic characteristics affect how consumers value the organic label alone and in combination with other labels. The analyses in the second and third essay are performed using two wheat product categories (bread and cookies) to examine how findings differ across different product categories.
This dissertation provides several societal benefits. The findings provide insights that may play an important role in supporting growth of the organic wheat production through reduction of uncertainty associated with wheat commodity prices and final consumer demand. Understanding the dynamics of organic wheat prices, how they can affect profitability of organic wheat production and what can be done to reduce the uncertainty is critical to organic wheat growers and food manufacturers when they make production decisions. The findings in the second and third essay will assist food manufacturers and marketers as they develop new products and marketing strategies and make labelling decisions. The findings in this dissertation may allow them to match consumers’ needs better, and thus use the limited organic wheat supply more efficiently.
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Janssen, Meike [Verfasser]. "Labelling schemes for organic food : consumer attitudes, preferences and willingness-to-pay in six European countries / Meike Janssen." Kassel : Universitätsbibliothek Kassel, 2011. http://d-nb.info/1018327754/34.
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Sjöström, Desirée. "Gustatory responsiveness of West African Chimpanzees (Pan troglodytes verus) to seven substances tasting sweet to humans." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-142267.
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Comparative studies of taste perception have found that primates may differ markedly in their sensitivity for substances perceived as sweet by humans. These findings raise questions about the reason that may underlie these differences in sweet-taste sensitivity between species. The aim of the present study was to assess the taste responsiveness of chimpanzees (Pan troglodytes verus) to seven substances tasting sweet to humans and to compare the results with those of other primate species. Using a two-bottle preference test (1 min) I found that the taste preference thresholds of the chimpanzees for five food-associated carbohydrates ranged between 20-30 mM for sucrose, 20-50 mM for fructose, 60-80 mM for glucose, 50-80 mM for maltose, and 30-80 mM for lactose. Taste preference thresholds for two steviol glycosides ranged from 0.04-0.05 mM for stevioside, and 0.03-0.05 mM for rebaudioside A. The chimpanzees displayed clear preferences for all sweet-tasting substances presented. In line with data obtained in other primates, the taste preference threshold of the chimpanzees for sucrose was lower compared to the other carbohydrates presented and the taste preference thresholds for stevioside and rebaudioside A were lower compared to sucrose. In general, the taste sensitivity of the chimpanzees fell into the range of data reported in other nonhuman primate species. Interestingly, the taste preference thresholds of the chimpanzees reported here are similar to the taste detection thresholds obtained in humans, despite the fact that the former are only a conservative approximation of an animal’s taste sensitivity. This suggests that chimpanzees may be as sweet-taste sensitive as humans.
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Soley, Graham T. "FARMED AND WILD-CAUGHT SHRIMP IN KENTUCKY AND SOUTH CAROLINA: CONSUMER PREFERENCE FOR HOMEGROWN BY HEROES, COMMUNITY SUPPORTED FISHERY, AND OTHER QUALITY ATTRIBUTES." UKnowledge, 2016. http://uknowledge.uky.edu/agecon_etds/39.
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As information regarding origin, production method, and environmental certifications characterize a progressing seafood market, scare analysis has been made to understand market responses. This study focuses on consumer preference for wild-caught and farm-raised shrimp with several attributes. These include the Homegrown By Heroes label and Best Aquaculture Practices certification, as well as other existing attributes including the Marine Stewardship Council and each state’s local label. Also considered are hypothetical labels including Community Supported Fishery (CSF) and National Oceanic & Atmospheric Administration (NOAA). This study surveys consumers in Kentucky and South Carolina while utilizing a choice experiment to elicit willingness-to-pay measures for these various product attributes.
Both wild-caught and farm-raised shrimp are considered since these species have significant market potential. Like previous studies, a strong preference for fresh as well as local shrimp was found. Furthermore, preference for Homegrown By Heroes was found to be highly valued by consumers, as well as the NOAA label signifying a federally operated ecolabel. Consumers were also found to value BAP and MSC certifications, two third-party agencies currently existent in the seafood market. Marketing and policy recommendations are given based on consumer willingness to pay estimates for these various seafood attributes in both states.
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Viegas, Inês Ferreira. "Consumers’ willingness to pay for safer, cleaner and animal friendlier beef." Doctoral thesis, Universidade de Lisboa. Faculdade de Medicina Veterinária, 2013. http://hdl.handle.net/10400.5/6413.
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Tese de Doutoramento em Ciências Veterinárias. Especialidade de Produção AnimalThe variety of food products available in supermarkets shelves is endless, fulfilling necessities that go beyond the need for food. In such perspective, there are an infinite number of products that might be valued by consumers, but are not available in markets, i.e. non-market goods. Alongside these potential, consumers have increased levels of awareness and concern about the way food is produced, namely food products of animal origin. Some consumer segments are even willing to pay more for products produced under standards they consider to meet their concerns. Within this framework, this thesis’ research topic involves the economic valuation of beef products which are differentiated through the presence of attributes related with beef safety, animal welfare an environmental protection. Therefore, the question central to this research is: Are consumers willing to pay for beef products with specific attributes such as food safety, animal welfare or environmental standards, going beyond legally imposed minimums? This question was answered having in mind the following specific goals: the review of the most relevant technical issues still to be solved and worth analyzing; the discussion during focus groups of consumers’ main concerns regarding animal welfare, food safety and the environment related with beef production and beef products; the implementation of a choice-experiment survey to allow estimating how much, on average, are consumers’ willing to sacrifice from their households’ budgets in order to buy this differentiated beef product, through the use of a MNL model. Our sample of Portuguese consumers stated they are willing to pay a premium for differentiated beef. A high significance for the MNL estimates was achieved and we found evidence of the need to jointly value closely related attributes namely due to the expected presence of very significant negative interactions. Additional conclusions include the suggestion that some of the stated consumer preferences are in fact citizens’ preferences, which may arise from the undisputable public nature of food safety, animal welfare and the environment. Finally, from a corporate perspective, this research shows some potentially differentiating strategies that could be implemented based on attributes such as national origin and traditional production systems.
RESUMO - A variedade de produtos alimentares disponíveis nas prateleiras dos supermercados é interminável, satisfazendo necessidades que vão muito além da necessidade alimentar. Nesta perspetiva, há uma infinidade de produtos que podem ser valorizados pelos consumidores, mas que não estão disponíveis nos mercados. Paralelamente a este potencial, os consumidores têm aumentado os seus níveis de consciência e preocupação com a forma como os alimentos são produzidos, nomeadamente em relação a produtos alimentares de origem animal. Alguns segmentos de consumidores estão mesmo dispostos a pagar mais por produtos produzidos sob padrões que eles consideram atender às suas preocupações. Neste contexto, o tema de investigação desta tese envolve a valoração económica de produtos de carne bovina, que são diferenciados pela presença de atributos relacionados com a segurança sanitária da carne, bem-estar animal e proteção ambiental. Portanto, a questão central desta pesquisa é: estarão os consumidores dispostos a pagar por produtos de carne de bovino com atributos específicos, tais como a segurança sanitária, bem-estar animal ou normas ambientais, que vão além dos requisitos mínimos legalmente impostos? Esta pergunta foi respondida tendo em vista os seguintes objetivos específicos: a revisão das questões técnicas mais relevantes a serem resolvidas tendo em conta a sua relevância para os consumidores; a realização de grupos de discussão para avaliar quais as principais preocupações dos consumidores sobre bem-estar animal, segurança sanitária da carne e meio ambiente no contexto da produção de carne de bovino; a implementação de um estudo de experiências de escolha para permitir estimar (através da utilização de um modelo MNL) o quanto, em média, estão os consumidores dispostos a sacrificar dos seus orçamentos familiares, a fim de comprarem esta carne diferenciada. Esta amostra de consumidores portugueses declarou estar disposta a pagar mais pela carne diferenciada. A elevada significância das estimativas MNL alcançada sugere a necessidade de valorar em conjunto atributos intimamente relacionados, nomeadamente devido à presença esperada de interações negativas muito significativas. As conclusões incluem a sugestão de que algumas das preferências dos consumidores são na realidade preferências de cidadãos, o que pode advir da indiscutível natureza pública da segurança sanitária, bem-estar animal e meio ambiente. Finalmente, do ponto de vista empresarial, esta pesquisa mostra algumas estratégias de diferenciação possíveis, que podem ser implementadas com base em atributos como a origem nacional e os sistemas de produção tradicionais.
This work was funded by Fundação para a Ciência e a Tecnologia, grant SFRH/BD/37715/2007
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Dahlhausen, Johanna Lena [Verfasser], Jutta [Akademischer Betreuer] Roosen, and Klaus [Akademischer Betreuer] Salhofer. "Motivation, preference and willingness to pay for selected credence food attributes / Johanna Lena Dahlhausen. Betreuer: Jutta Roosen. Gutachter: Klaus Salhofer ; Jutta Roosen." München : Universitätsbibliothek der TU München, 2016. http://d-nb.info/1099594545/34.
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Favre, Cécile. "Analyse en normes l1 et l0 des distances et des preferences : plannification en analyse sensorielle : application au confort d'accueil de sieges automobiles." Rennes 2, 1999. http://www.theses.fr/1999REN20028.
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L'analyse des données peut être présentée comme l'ensemble des outils et techniques permettant la représentation des dites données. En fait, ce ne sont pas celles-ci qui seront représentées mais des relations de proximité observées ou calculées. Deux grands types de méthodes s'opposent, ou plutôt se complètent. Apres avoir montre que ni la première, qui analyse des notions de ressemblance, ni la seconde qui représente les notions d'écartement, s'appuyant toutes les deux sur le principe de projection ne permettent de trouver la meilleure représentation d'une matrice de dissimilarités, nous proposons une nouvelle approche d'analyse métrique en norme l1. Nous proposons une solution algorithmique au problème de m. D. S. Ll, appelé dist, qui permet le calcul de solutions exactes, optimum ou heuristiques. L'adaptation de ce modèle aux données de préférences est a l'origine de pref1 et pref0 utilisant respectivement les normes l1 et l0. Ils permettent d'analyser les préférences d'une population non homogène et de retrouver plusieurs ordres sous-jacents. Enfin, un outil de planification de comparaisons par a été développé (p. E. Paires). Le lien entre le résultat de l'analyse des préférences et les préconisations sur variables instrumentales est réalisé par le biais d'un calcul de tolérances. L'étude présentée concerne le confort statique de sièges automobiles. Elle contient toutes les étapes depuis le choix d'une population cible sur des critères anthropométriques, la création d'un espace produit, le recueil des préférences et des mesures instrumentales jusqu'a l'analyse des données permettant le calcul des tolérancesData analysis can be described as all the tools and techniques allowing the representation of said data. Indeed, it is not these which are represented, but instead observed or calculated proximity relations. One can distinguish two main types of methods which supplement each other, both based on the principle of projection. After having shown that neither the first, which analyses notions of likeness, nor the second, which expresses notions of remoteness, can lead to the best representation of a dissimilarities matrix, we set out a new multidimensional scaling approach under the l1-norm. We propose an algorithmic solution to the m. D. S. -l1 problem, called dist, which allows the computation of exact, optimum or heuristic solutions. The adaptation of this model to preferences data is at the origin of prefl and pref0 based on the l1 and l0 standards respectively. They allow the analysis of the preferences of a non-homogeneous population and to trace a number of underlying orders. Last, a paired comparisons planning tool has been developed (p. E. Paires). The link between the result of the analysis of preferences and the recommendations based on instrument-measured variables is established by means of a tolerance calculation. The study presented here deals with the static comfort of car seats. It includes all the steps from the selection of a target population based on anthropometric criteria, through the creation of a representative collection of products, capturing preference and measurement data, up to the data analysis allowing the calculation of tolerances
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Kompaniyets, Lyudmyla. "Effect of Nutrition Merchandising and Consumer Preferences on Willingness to Pay for Local Tomatoes and Strawberries in Kentucky and Ohio." UKnowledge, 2012. http://uknowledge.uky.edu/agecon_etds/5.
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This project investigates the impacts of nutrition merchandising on consumers’ willingness to pay for local tomatoes and strawberries. The data come from survey of Kentucky and Ohio residents in June 2011. Two thousand one hundred twelve individuals from Kentucky and Ohio were surveyed, to find out the impact of selfawareness of health benefits and health benefits information on their willingness to pay. The consumers were offered one of the three survey versions. The versions varied by how much nutrition information was provided to the consumer related to both strawberries and tomatoes – otherwise identical. A had the most, B had text only, and C omitted any nutritional benefits. This nutrition preamble was offered just before doing a payment card willingness-to-pay experiment. Standard demographic data were also included. The goal of the study was to see if and in what way the provision (or nonprovision) of this information, as well as consumers’ own knowledge of nutritional benefits of local foods, their beliefs and lifestyle influenced their willingness to pay for these local products.
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Engel, Wendy. "Determinants of consumer willingness to pay for organic food in South Africa." Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-11242008-080548/.
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