Dissertations / Theses on the topic 'Transport competition'
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1
Vigren, Andreas. "Competition in Public Transport : Essays on competitive tendering and open-access competition in Sweden." Doctoral thesis, KTH, Transportvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-217267.
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The results of this work show that the cost efficiency of tendered bus services is similar across all Swedish counties, except for the more high-density counties where efficiency is lower. Considerably lower efficiency is also found for contracts with services run in-house by the Public Transport Authority (PTA), compared to when the same service is run by a private actor. With respect to the competitive environment, it was found that many contract design factors have little or no effect on the number of bids that the PTA sees in their tenders. No measure that could be imposed by a single PTA was found to increase the total number of bidders by more than 0.5 bidders. However, the results suggest that PTAs as a collective could try to avoid tendering too many contracts at the same time because this was shown to reduce participation by up to about two bidders. In addition, these studies show that the local competitive environment is important for the PTAs to consider. The way in which contract areas are defined will also affect the participation rate as operators were found to participate in tenders to a lower extent the farther their workplaces are from the contract area. While larger operators appear to be less sensitive with respect to such distances, the fact that smaller operators are, and that they often bid as one unit as members of cooperation companies, makes the competitive environment important. The results suggest that depots could be included in the contract to stimulate participation, but this is by no means the only nor an easy solution. This thesis has also analyzed the entry made in 2015 by MTR Express (MTR) on the Stockholm-Gothenburg railway line. The overall conclusion is that customers are indeed facing lower prices one and a half years after the entry. MTR's prices are on average 100 SEK lower than the incumbent SJ's prices. Furthermore, the analysis shows that the incumbent’s prices have also gone down, by almost 13 percent, following the entry.QC 20171106
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Walter, Matthias. "Efficiency and Competition in Public Transport." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-27042.
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Bus and other road-bound services like tram and light railway are the backbone of the German local public transport sector. Based on the characterization of high deficits and fragmentation, five main research questions and hypotheses are investigated in this dissertation. First, advanced Stochastic Frontier models which account for unobserved heterogeneity and heterogeneous output variables are used to study cost efficiency and its determinants such as the vehicle utilization rate. Second, economies of scale and scope are evaluated. Third, based
on the finding of substantial economies of scale, potential gains from hypothetical mergers are calculated using Data Envelopment Analysis. Fourth, I focus on competitive tendering, another option to increase efficiency in this sector. Analyzing operator changes, I find in majority regional bus services tendered out and structural conditions significantly increasing the probability for operator changes, like tendering in bigger volumes. Fifth, internal and external cost advantages for express coach services as a diversification option for public transport are confirmed. In conclusion, the results of my research are relevant to the strategic decision process of firm management as well as regulators.
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Wong, Kam. "Public transport competition between bus and rail." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B3159475X.
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黃鑑 and Kam Wong. "Public transport competition between bus and rail." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B3159475X.
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Traytak, Sergey D. "Time-dependent competition effects in diffusion-limited crystal growth: Time-dependent competition effects in diffusion-limitedcrystal growth." Diffusion fundamentals 6 (2007) 47, S. 1-2, 2007. https://ul.qucosa.de/id/qucosa%3A14226.
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Traytak, Sergey D. "Time-dependent competition effects in diffusion-limited crystal growth." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193781.
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Chen, Ching-Fu. "Intermodal transport competition in Taiwan : empirical and theoretical issues." Thesis, Lancaster University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322882.
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Johansson, Erik. "Competetive Tendering of Public Transport : Estimating Effects of Competition." Thesis, Umeå universitet, Nationalekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-106971.
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Singh, Manoj. "Competition in intermodal rail transport : the case of Indian railways." Thesis, University of Leeds, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.496204.
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Duporge, François-Xavier (François-Xavier Pierre Henri) 1964. "Competition in tendering of urban public transport services in France." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/65714.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 1999.Includes bibliographical references (leaves 86-89).
The French tendering system for urban public transport services, introduced by the Sapin law in 1993, has often been criticized for its lack of competition. In order to check the relevance of this criticism, this thesis examines the degree of competition in the French market, using two surveys of the outcomes of tenders in the urban public transport networks outside the Paris region. The first one was conducted by the CER TU ( Centre d'Etudes sur les Reseaux, les Transports, l'Urbanisme Et les Constructions Publiques) in 1996. The second survey, undertaken in 1999 as part of this thesis research, focused on networks serving a population over 200,000 inhabitants and is based on the official minutes of the organizing authorities on the deliberation of the delegation of urban public transport services, and interviews conducted with organizing authorities, operators, and several organizations involved in urban public transport in France. Based on these two surveys, it is established that there is a small number of participants in most French tenders and that the operators in general lack competitive behavior. From this evidence, the thesis identifies five reasons for the lack of competition in the French tendering system. One obstacle is regulatory: labor law L122.12, which imposes the renewal of employment contracts on the new incumbent. The other four obstacles are: asymmetries among bidders, high tendering costs, high operation risks, and the OA' s perceived failure to conduct a fair selection. A literature review of the relevant theories on competition, industry concentration and tendering, is conducted in order to support the analysis of obstacles to competition in French tendering with the necessary theoretical background. It is then shown that all the five factors are barriers to entry, and that they should be removed, or at least reduced, in order to stimulate the entry of new competitors and therefore true competition. The thesis concludes with a presentation of a set of three strategies to improve the competition in the French market, that could be implemented within the current regulatory framework, that is to say, without modifying labor law L122-12. For each strategy, the tradeoffs between increased competition and effectiveness and quality of service are discussed. The first strategy consists of the reduction in the bundle size of service to be tendered out. The second strategy proposes a reduction of contract duration, and the third strategy consists in the improvement of the specification and selection process. It is recommended to combine all three strategies together for maximum impact on competition; this impact may however be modest, as a major barrier to entry, labor law L122-12, has not been removed. The modest increase in the number of bidders that could be achieved may still lead to an improvement in competition, and therefore in price.
by François-Xavier Duporge.
S.M.
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Reynolds, Michael Matthew. "Theoretical investigations into competition, regulation, and integration in transport networks." Thesis, University of Hull, 2009. http://hydra.hull.ac.uk/resources/hull:8394.
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This thesis consists of three parts. In the first part, we review the literature and some of the key issues in UK transport. We identify a need to discourage car use and the role that public transport plays in this. We discuss the various options available to policymakers to reduce problems of congestion and pollution. We note how the emphasis on deregulation and competition to promote public transport, and discourage car use, have had perverse side effects. In some cases, public transport services have become disintegrated; resulting in reductions in flexibility and increasing the generalised cost of travelling – making public transport less attractive. This raises an important question: how do we encourage a greater degree of service integration without undoing the gains from competition? The second part of the thesis, explores this issue using a theoretical transport network model. We find that various regimes involving private firms are likely to lead to the provision of an integrated ticketing system, but that not all such regimes are socially desirable. We consider how the configuration of regulatory policy may steer the private firms to produce more socially desirable outcomes. The deregulation of elements of the UK public transport network has often led to situations approaching local monopoly. The third part of this thesis investigates the private (monopoly) incentive to offer joined-up services relative to the social incentive. The more complete the service provision, the closer the match with consumer’s preferences, and the lower the generalised cost of travel. We find the monopolist does not always choose the socially desirable level of service, even when economically viable, but it may be possible to induce this provision through entry or threats of entry on a sub-set of the network. The thesis ends with a summary of the main results and suggestions for further work.
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Dal, Cengio Sara. "Competition and Response: from Active Matter to Electrolytes under Confinement." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/670864.
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Most systems in Nature manifest complex transport phenomena arising from the interplay of multiple time and length scales, be them intrinsic in the system’s dynamics or externally enforced. It is the case, for instance, of a colony of migrating cells whose competing mechanisms of self-propulsion and interaction allow for the reorganization into different tissues. Or, by ‘zooming in’ and looking at the same system on a different scale, it is the case of the ionic channels located in the membranes of the aforesaid cells. These channels typically exhibit extraordinary ion selectivity and water permeability due to the interplay between geometric confinement, surface properties and external drivings. Whether to investigate the collective structures of the former system, or the nanofluidic properties of the latter one rests on the interests of the reader. In any case, she will find some food for thought in this thesis.
Here we aim at the study of the transport properties of two very different classes of systems: active matter and electrolytes under confinement. In the examples above drawn from biology, cell tissues belongs to the class of active matter and protein channels are the archetype nanometric ionic systems. We tackle the problem from a purely statistical physics viewpoint by constructing minimal models to study the system’s response to outside influences and, by doing so, learn something about its internal properties.
In the case of active matter, the challenge resides in the intrinsically out-of-equilibrium nature of its constituents, having the ability to self-propel by consuming fuel stored in the environment. In Part I of the manuscript, we study how the interplay between self-propulsion and steric interactions affects the linear response of active systems. First, we construct a very general theoretical framework which allows to derive general constraints that arbitrarily out-of-equilibrium systems must fulfilled. Then, we apply it to two different minimal models of active systems to derive generalized fluctuation-dissipation relations and Green-Kubo expressions.
In Part II of the manuscript we investigate the surface-dominated transport of electrolytes in (i) a nanofluidic diode and (ii) a scanning ionic conductance microscopy configuration. In both cases, we develop a theory of ionic conductivity that rationalizes previous experimental results. By doing so, we shed light on the importance of the surface versus bulk competition in controlling ionic transport and we propose a new approach to exploit it for the imaging of surface charge with nanometric resolution.La mayoría de los sistemas en la Naturaleza manifiestan fenómenos de transporte complejos que surgen de la interacción de múltiples escalas de tiempo y longitud, ya sean intrínsecas en la dinámica del sistema o forzadas externamente. Es el caso, por ejemplo, de una colonia de células migratorias cuyos mecanismos competitivos de autopropulsión e interacción permiten la reorganización en diferentes tejidos; o, al "acercar" y mirar el mismo sistema en una escala diferente, es el caso de los canales iónicos ubicados en las membranas de las células mencionadas. Estos canales exhiben típicamente una selectividad de iones extraordinaria y permeabilidad al agua debido a la interacción entre el confinamiento geométrico, las propiedades de la superficie y los conductos externos. Ya sea para investigar las estructuras colectivas del primer sistema, o las propiedades nanofluídicas del último, se basa en los intereses del lector. En cualquier caso, encontrará algo de reflexión en esta tesis.
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Chittenden, Sandra Jane. "Systems analysis of amino acid transport competition in health and disease." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/46999.
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Wong, Wai-sum May. "Public light bus service in a challenging transport environment." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B31633109.
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Konrad, Wilfried, Christoph Neinhuis, and Anita Roth-Nebelsick. "Competition between diffusion and advection may mediate self-repair of wax microstructures on plant surfaces." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-202156.
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Cuticles are extracellular membranes covering the primary aerial parts of vascular plants. They consist of a multifunctional polymeric
material with embedded soluble components, called waxes and serve as the interface between plants and their atmospheric environment,
first of all protecting them from desiccation. Waxes are produced within the epidermal cells, then transported to the leaf surface and finally
integrated into the polymer or deposited upon the cuticle.
Remarkably, damaged wax layers may become repaired within a few hours. Base on an earlier hypothesis we present a theoretical framework explaining how waxes are transported through the plant epidermis by a combination of advection and diffusion. This combination suggests also a self-regulating repair mechanism, based on the assumption that intact cuticles induce an antagonistic equilibrium between advection and diffusion: whenever a wax layer is damaged, the equilibrium is disturbed in favour of advection, starting a repair process, which is intrinsically coming to an end after the cuticle has gained its original thickness.
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Voudouris, Ioannis. "Maritime transport properties and competition law issues : partial function cooperation agreements in liner and tramp shipping." Thesis, Queen Mary, University of London, 2012. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8764.
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The thesis deals with selected competition issues that occur within the dynamic and high-risk market of shipping, examining competition law issues in liner consortia and tramp pools through an EU Competition Law prism. These partial function joint ventures are the predominant form of alliances in the maritime sector. Liner trade is primarily organised in consortia, while pools are the most common form of tramp shipping alliance. The thesis' synthetic and analytic research incorporates the methodology and structure used in its competition law bibliography, while the legal analysis is informed with sources from microeconomics and maritime economics. The issues that are examined in relation to shipping include the four main areas of competition law: the relevant market, indicators of dominance, compliance of the alliance agreements with Article 101 TFEU and abusive conducts by dominant undertakings under Article 102 TFEU. The development of the above areas aims to demonstrate the interaction of sector particularities with competition law as a whole.
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Lu, Angela Cheng-Jui. "International airline alliances : EC competition law-US antitrust law and international air transport /." Leiden, 2002. http://catalogue.bnf.fr/ark:/12148/cb41007115m.
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SIMONELLI, FELICE. "Selected Topics in Regulation and Competition." Doctoral thesis, Luiss Guido Carli, 2013. http://hdl.handle.net/11385/200835.
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Opportunità di pre-funding delle infrastrutture aeroportuali italiane alla luce di un’analisi di benchmarking delle tariffe dei servizi aeroportuali internazionali. The role of the discount rate in cost-benefit analysis between theory and practice: a comparative survey. The harmonization of market entry regulation for the operation of air services in the European Union: a comparative survey of the implementation of Regulation (EC) no. 1008/2008 by member states' authorities. The "dark side" of code-sharing - The anticompetitive effects of code-sharing agreements among airlines.
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Essien, E. E. "Competition between air and sea transport in the overseas trade of West Africa." Thesis, Cardiff University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373126.
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Whelan, Stephen P. "Land freight transport in Australia : an economic analysis of regulatory and competition reform." Thesis, The University of Sydney, 1996. https://hdl.handle.net/2123/27642.
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An examination of land freight transport in Australia shows that a diverse range of influences
have shaped its development and structure over time. Parochial political interests have
constituted a potent input into the development of policy, made possible by the federal structure
of the Australian governmental structure. Australia is in no way unique in this sense, but the
structure and its constituent elements have, over time, resulted in the development of land
freight transport policy which has proven, in some respects, to be inefficient and ineffective.
Despite a perception that land freight transport policy has been inadequate in the past, attempts
to comprehensively reform the regulatory framework in which the land freight transport task is
undertaken have not proved successful. This has been partly due to constraints imposed by
institutional forces beyond the reach of policy makers. More recently, however, changes in
institutional constraints provided an opportunity for reform to be initiated. Coupled with a
commitment on the part of constituent governments to seek economically efficient national
solutions, changes have occurred in the regulatory environment for land freight transport in
Australia.
The nature of the economic relationships underlying the freight transport task are examined,
and a modelling framework developed for analysing the freight transport task within a spatial
equilibrium framework. Although not applied directly to the issue of concern in the present
study, the technique represents a useful tool to analyse freight transport relationships in the
future. In lieu of the direct application of the spatial transport equilibrium model developed,
previous Australian studies are reviewed and inter-state land freight transport demand
relationships estimated.
The economic implication of regulatory and competition reforms are assessed in the context of
a federal structure of government, and a scenario in which the freight transport task represents
a diverse set of activities. The study concludes that although the reforms offer opportunities to
enhance the regulatory environment for land freight transport, the results to date do not show
unambiguous gains from the changes which have occurred, or which are envisaged.
Moreover, considerations other than cost-benefit considerations may undermine the persuasive
arguments on which much of proposed reforms have been premised. This is likely to lead to
misguided policy which, in the long run, does not prove to be welfare enhancing, and which
may not correspond with the institutional framework underlying the Australian federal
structure.
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Piechucka, Joanna. "Essays in competition policy and public procurement." Thesis, Paris 1, 2018. http://www.theses.fr/2018PA01E013.
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Cette thèse de doctorat étudie trois questions de recherche en matière de marchés publics et de politique de la concurrence. Le premier chapitre se concentre sur une analyse microéconométrique des relations stratégiques entre d’une part l’entreprise choisie pour l’attribution d’un marché public et d’autre part l’autorité publique chargée de la régulation d’un service public. Il exploite des données sur le transport public urbain en France pour étudier les déterminants de choix réglementaires qui impactent à leur tour la rentabilité des opérateurs de transport. Le deuxième chapitre explore une évaluation ex-post d’une fusion qui a eu lieu entre deux grands groupes de transport en France (Veolia Transport et Transdev), en se concentrant sur l’existence éventuelle de gains d’efficacité dans les fusions. Enfin, le troisième chapitre donne un aperçu de l’impact d’une fusion lorsque les entreprises se font concurrence pour la qualité et repositionnent leurs services en analysant l’industrie hospitalière françaiseThis PhD dissertation studies three research questions in public procurement and competition policy presented in the respective chapters and preceded by a general introduction. The first chapter focuses on a microeconometric analysis of the strategic relationships between a firm awarded a public contract and the public authority responsible for regulating a public service. It exploits data on the French urban public transport industry to study the determinants of regulatory contract choices which in turn impact the cost efficiency of transport operators. The second chapter explores an ex-post assessment of a merger which took place between two major transport groups in France (Veolia Transport and Transdev), focusing on the possible existence of merger efficiency gains. Finally, the third chapter provides insight on the impact of merger when firms compete in quality and reposition their services by analyzing the French hospital industry
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O'Reilly, Margaret Dolores. "Intensity of competition in a recently deregulated industry : the airline industry of the European Community." Thesis, University of Surrey, 1995. http://epubs.surrey.ac.uk/844062/.
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This thesis examines the liberalisation of the European Community's civil aviation industry and attempts to measure how effective this process has been in achieving its goal of increased competition and greater efficiency. Using the experience in the United States following deregulation of domestic air transport services as a template, the study employs Easton's model of political analysis and Porter's model of competitive forces as a framework for empirical research. This research was carried out with a representative sample of EC airlines, of their suppliers and customers, of providers of substitute services and of the industry's regulators. The results of the research were validated by personal interviews with leading stakeholders in the industry. The main Conclusions drawn from the research are that: i. liberalisation of the European Community air transport market has resulted in an influx of new entrants, an increase in the number of routes operated and a wider availability of discounted fares; ii. to the extent that competition has nevertheless been less fierce than anticipated, this is because the aims of liberalisation have been frustrated by a resistance to change on the part of certain Member States and by the European Commission's inability to prevent further grants of State aid to loss-making flag carriers. Inadequate infrastructure has also acted as a brake on competition; iii. customer choice is strongly influenced by frequency of service and by price. Those airlines which have set out to gain market share and which have pursued low price strategies have benefited most from liberalisation; iv. airlines benefit from selling to a large number of buyers and from having a wide choice of suppliers; V. the only threat of substitution to air travel within the European Community is from the High Speed Train and then only over comparatively short distances.
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Pinka, Jan. "Konkurence mezi osobní železniční a leteckou dopravou." Master's thesis, Vysoká škola ekonomická v Praze, 2014. http://www.nusl.cz/ntk/nusl-193178.
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Main topic of this thesis is mapping of competition between rail and air transport. The first goal is to find out, which of these two types of transport is preferable for the customer, if he has the opportunity to select plane or train. To reach this goal is chosen 15 connections between cities and on these connections is rail and air transport compared in terms of price and total travel time. The second goal is to research the behavior and decision-making of customers, who use rail and air transport.
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Kuzovkov, Vladimir N., Guntars Zvejnieks, and Eugene A. Kotomin. "Diffusion and self-assembly of charged nanoparticles in polar media: a competition between short-range and long-range interactions." Diffusion fundamentals 24 (2015) 31, S. 1, 2015. https://ul.qucosa.de/id/qucosa%3A14547.
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Juang, Yih-Ching. "Inter-port competition and inland container transport : a multiple criteria decision-making approach to achieve intermodal transport system development strategies in Taiwan." Thesis, University of Plymouth, 2009. http://hdl.handle.net/10026.1/2833.
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Inland container transport has intensified over the past thirty years in Taiwan. It is closely related to inter-port competition and port selection by container carriers. In the 1980's, large containerships only berthed at Kaohsiung port due to the limit of container terminal operation capacities of Keelung port and the carrier's regional hub port decision in the country region. The container traffic of the south-north motorways made them more crowded and increased road maintenance expenses. The purpose of this research is to study inter-port competition and inland container transport flows in Taiwan. Although Taiwan is an island, the freight transport policy has been focused on rail and motorway rather than sea transportation. Therefore, it is intended to study the contexts of inland container traffic flows and the inter-port competition model. Following from this, the main objectives are to understand the details of container ports in order to identify the major criteria and variables related to the development of the intermodal freight transport system and then to create an integrated decision-making process model as a framework to help the public sector make quality decisions. We designed, tested and evaluated a public involvement process that identified public values for use in the development of an intermodal transport system for the container port. The methodology of this research includes the development of a Multiple Criteria Decision-Making (MCDM) model based on the Analytic Hierarchy Process (AHP) and validated by the use of priority setting for the intermodal transport system at Kaohsiung port as a case study. The main idea behind mathematical programming is the optimal selection of a set of research activities given limited resource availability, decision constraints and the pursuit of multiple objectives. A final model addresses the simultaneous analysis of the selection process clearly able to be traced back by all parties. This research developed a framework that will enable the public sector to make better decisions when selecting intermodal transport system proposals and also save decision-makers time and effort.
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Wall, Rickard E. "The importance of transport costs for spatial structures and competition in goods and service industries /." Linköping : Univ, 2001. http://www.bibl.liu.se/liupubl/disp/disp2001/man50s.htm.
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Paganelli, Filippo. "Cooperation and competition in the air transport market: current scenario, possible evolutions and analytical tools." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amsdottorato.unibo.it/4906/1/paganelli_filippo_tesi.pdf.
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dall'avvento della liberalizzazione, aeroporti e vettori hanno vissuto cambiamenti. Il maggior miglioramneto nella gestione degli aeroporti è una gestione più commerciale ed efficiente. Le forme di regolazione economica e le caratteristiche della gestione manageriale sono state indagate. Dodici paesi sono stati scelti per indagare la situazione del trasporto aereo mondiale, fra questi sia paesi con un sistema maturo sia paesi emergenti. La distribuzione del traffico è stata analizzata con l'indice HHI per evidenziare aeroporti con concentrazione maggiore di 0,25 (in accordo con la normativa statunitense); il sistema aeroportuale è stato analizzato con l'indice di Gini e con l'indice di dominanza. Infine, la teoria dei giochi si è dimostrata un valido supporto per studiare il mercato del trasporto aereo anche con l'uso di giochi di tipo DPSince the advent of the liberalization process, both the airport and the airline have witnessed substantial changes. The greatest improvement in airport management has been the adoption of more commercial-oriented and efficient policies. Traditional forms of regulations as well as the characteristics of the commercial management have been investigated. A sample of twelve countries has been chosen in order to investigate the situation of air transport market worldwide, among those there are countries with a mature airport system as well as emerging countries. The traffic distribution at airports has been analysed with the HHI to highlight airports with a concentration higher than 0,25 (according to US normative); the airport system has been analysed through the use of both the Gini concentration index and the Dominance Index. Finally, the games theory has proven to be a valid support to the study of air traffic market, even by the use of simple Prisoner’s dilemma-like games.
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Paganelli, Filippo. "Cooperation and competition in the air transport market: current scenario, possible evolutions and analytical tools." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amsdottorato.unibo.it/4906/.
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dall'avvento della liberalizzazione, aeroporti e vettori hanno vissuto cambiamenti. Il maggior miglioramneto nella gestione degli aeroporti è una gestione più commerciale ed efficiente. Le forme di regolazione economica e le caratteristiche della gestione manageriale sono state indagate. Dodici paesi sono stati scelti per indagare la situazione del trasporto aereo mondiale, fra questi sia paesi con un sistema maturo sia paesi emergenti. La distribuzione del traffico è stata analizzata con l'indice HHI per evidenziare aeroporti con concentrazione maggiore di 0,25 (in accordo con la normativa statunitense); il sistema aeroportuale è stato analizzato con l'indice di Gini e con l'indice di dominanza. Infine, la teoria dei giochi si è dimostrata un valido supporto per studiare il mercato del trasporto aereo anche con l'uso di giochi di tipo DPSince the advent of the liberalization process, both the airport and the airline have witnessed substantial changes. The greatest improvement in airport management has been the adoption of more commercial-oriented and efficient policies. Traditional forms of regulations as well as the characteristics of the commercial management have been investigated. A sample of twelve countries has been chosen in order to investigate the situation of air transport market worldwide, among those there are countries with a mature airport system as well as emerging countries. The traffic distribution at airports has been analysed with the HHI to highlight airports with a concentration higher than 0,25 (according to US normative); the airport system has been analysed through the use of both the Gini concentration index and the Dominance Index. Finally, the games theory has proven to be a valid support to the study of air traffic market, even by the use of simple Prisoner’s dilemma-like games.
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Barry, Nicholas Peter. "Investigations of photorefractive barium titanate at high intensity." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362353.
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Petsikas, George. "Airline deregulation and competition in the Canadian air transport industry today, and prospects for the future." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59582.
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The 1980s can easily be qualified as the most important decade in the history of Canadian commercial aviation as it was witness to two important phenomena. To begin with, after six decades of stringent regulation and control, the State finally realized that international trends and domestic needs dictated a drastic reduction in the role it played in the economic affairs of its airlines. Airline deregulation thus became a reality in Canada and as such, a detailed review of the process leading to the adoption of the National Transportation Act, 1987, as well as an extensive legal analysis of the legislation itself are warranted.The second major development was the extremely rapid process of consolidation, precipitated mainly by deregulation, into an industry dominated by two airlines; a duopoly. The implications arising from this situation for present and future competition in the Canadian air transport industry, as viewed from a market contestability perspective, need to be assessed.
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Holtkamp, Michael [Verfasser]. "The Wider Impacts of Transport Infrastructure Investments: Agglomeration and Imperfect Competition in General Equilibrium / Michael Holtkamp." Kiel : Universitätsbibliothek Kiel, 2018. http://d-nb.info/1169132634/34.
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Davies, Reg. "Public passenger transport in inter-war Britain : the Southern Railway's response to bus competition, 1923-39." Thesis, University of York, 2014. http://etheses.whiterose.ac.uk/8905/.
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Scholarly criticisms of the quality of British railway management between the world wars have focused partly on the allegedly inept reaction to the threat of bus competition. By contrast this thesis shows that the Southern Railway (SR) developed policies and practices with regard to the bus industry that were rational and broadly successful given the legal, political and economic circumstances. The SR was probably atypical of the four major inter-war railways. Because of the social and economic geography of the areas it served, it suffered less from bus competition and a smaller decline in receipts from passenger trains. Nevertheless in common with the rest of the industry, management action was greatly hampered in the 1920s by political opposition to direct bus operation. A key finding is that legislation in 1928 had the unintended effect of determining that the railways instead entered into partnerships with bus companies. In the SR’s case this policy produced considerably greater returns on capital than historians have hitherto thought. The SR influenced rather than controlled its associated bus companies, allowing them considerable commercial freedom. Even so the SR was largely able to shape network development to its advantage and to introduce measures, such as through ticketing, that were seen by contemporaries as key elements in reducing public-transport competition and thus enhancing consumer benefits. However, in practice such measures probably proved more advantageous to the company than its passengers. In sum the SR’s policies and practices in relation to bus competition were much more adroit than scholars have previously allowed. This study cannot demonstrate that the quality of the SR’s management was equally good across the company’s multi-faceted business. Nevertheless in this limited sphere, the SR achieved the most advantageous result possible, an outcome reflecting considerable credit on its managers.
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NASSI, Marianna. "Reactive transport of pollutants in porous media." Doctoral thesis, Università degli studi di Ferrara, 2012. http://hdl.handle.net/11392/2389259.
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Accidental or deliberate crude oil spills have been, and still continue to be, a significant source of environmental pollution, and pose a serious environmental problem, due to the possibility of air, water and soil contamination. Chlorinated volatile organic compounds (VOCs), such as 1,1-dichloroethylene (DCE) and aromatic hydrocarbons, BTEX (benzene, toluene, ethyl benzene and xylene) constitute a significant fraction of hazardous air and water pollution. Human beings are exposed to elevated levels of a wide spectrum of VOCs, many of which have been found to be toxic and potentially carcinogenic. Removal of these organic contaminants from water and wastewater has been achieved using several treatment technologies, such as advanced oxidation processes, air stripping, reverse osmosis, ultrafiltration and adsorption.
Adsorption processes can be successfully used when contaminants are not amenable to fast biological degradation. Permeable Reactive Barriers (PRB) are one of the most promising passive treatment technologies, due to their effectiveness regarding various contaminants, and their low cost compared to other in situ technologies. Typical PRB configuration consists in a permeable treatment zone placed vertically to the flow path of groundwater, which contains reactive material that immobilises or decomposes the contaminants by adsorption as the groundwater flows through it.
PRBs are installed as permanent, semi-permanent, or replaceable units. A wide variety of pollutants are degraded, precipitated, sorbed or exchanged in the reactive zone, including chlorinated solvents, heavy metals, radionuclides and other organic and inorganic species.
Conventional permeable reactive barriers for the decontamination of water are based on systems which most widely use Granular Activated Carbon (GAC).
GAC has been shown to be only slightly effective in treating water containing very soluble compounds, such as oxygenated organics, or low molecular weight compounds, such as DCE and vinyl chloride (VC). However, their use for the removal of organic contaminants in water and wastewater applications can be complicated by the presence of dissolved natural organic matter in the water stream being treated, which can decrease the removal efficiency of GAC. When activated carbon is saturated, it has to be regenerated or renewed, which is rather an expensive operation. The adsorbed molecules are then released and still have to be destroyed by thermal treatments. Moreover, this additional treatment also degrades the activated carbon adsorption properties in the long term [1]. Zero-valent iron (ZVI), which directly degrades several contaminants, appears to be ineffective too, both on irreducible compounds such as DCE and chlorobenzenes as well as on hydrocarbons. Furthermore, when ZVI is used, it causes a reduction in the permeability of the barrier due to encrustations or precipitation of minerals which derive from the reactions between the ions of the oxidised metal and the substances contained in the groundwater [1-2]. Therefore, when operating with a barrier based on metallic iron alone, the chemical reduction reaction of the reducible compounds can require from 1 to 2 days. In this case, it is only the thickness of the iron which can ensure the time necessary for completing the reactions and large quantities are required to guarantee the complete decontamination of the groundwater.
Recently, high-silica zeolites were shown to be more effective than activated carbon or ZVI in removing certain organics from water [3-4].
The selection of zeolites from among the large variety of adsorbent materials is based on their stability and efficiency properties.
To date, the adsorption mechanisms of zeolites in gas phase systems have been widely investigated. On the contrary, studies and applications on organic pollutants adsorption in microporous zeolitic materials from aqueous media have been relatively scarce. Adsorption from gas phase systems can significantly differ from that observed from the corresponding aqueous solutions, due to the highly polar nature of water molecules. In literature, it has been reported that water plays a very important role in the diffusion of hydrocarbons in the zeolite pore system. In particular, large amounts of co-adsorbed water molecules block the migration of host molecules such as alkanes and olefins, thus reducing the adsorption capacity of zeolites, especially at low adsorbate concentrations. As a consequence, water acts as a screen between the cationic sites of the zeolite and the hydrocarbon molecules (screening effect) and reduces both the sorption volume (steric effect) and the aperture of the zeolite windows (blocking effect). On the contrary, small amounts of co-adsorbed water lower the extent of specific adsorption without significant blocking effects. However, as mentioned above, this research on hydrocarbon adsorption has also mainly been focused on single components from air matrices, whereas there are few studies involving aqueous dilute solutions. Nonetheless, in most environmental applications, these pollutants are present as very dilute aqueous solution mixtures.
The work developed in the present thesis is part of a wider project whose purpose is to study the interaction and mobility of groundwater pollutants adsorbed in zeolite pores, in order to improve the efficiency of permeable reactive barriers. This project involves Ferrara and Bologna Universities with the financial support of the ENI and the scientific support of Dr. Roberto Bagatin of the research centre of Novara. Several techniques were employed such as X ray diffraction, gas chromatography, IR spectroscopy, thermal analyses, as well as computational studies.
In this thesis, combined diffractometric, thermogravimetric and gas chromatographic techniques were employed to study the adsorption process in order to: 1) investigate the adsorptive properties of these hydrophobic synthetic zeolites; 2) characterise their structure after the adsorption of selected contaminants (1-2 dichloroethane, tert-butyl methyl ether and toluene); 3) localise the organic species in the zeolite channel system; 4) probe the interactions between organic molecules and framework oxygen atoms; 5) compare the adsorption data for a mixture of these contaminants with concentrations in the ppb and ppm range; 6) characterise the kinetic of the adsorption processes.
In particular, the thermodynamic and kinetic of the adsorption processes of contaminants on hydrophobic zeolites were obtained by using complementary, batch, linear and non-linear chromatography and thermogravimetry techniques. Batch and non-linear chromatography were mainly used to measure the adsorption isotherms for the compounds of interest. The adsorption isotherm is useful in representing the capacity of a zeolite to adsorb organics from waste, and in providing description of the functional dependence of capacity on the concentration of pollutants. Experimental determination of the isotherm allows to evaluate the feasibility of adsorption for treatment, to select a zeolite, and to estimate adsorbent dosage requirements. Moreover, it is possible to evaluate the adsorption energy distribution of the process from isotherm parameters. Batch and linear chromatography, instead, were employed to investigate the kinetic of the adsorption. Kinetics deals with changes in chemical properties in time and is especially concerned with the rate of changes and plays a fundamental role in determining the proper time contact for the removal of pollutant components from wastewater. In addition, an original theoretical model able to give information regarding the kinetic and the thermodynamic constants of systems in which both reactions and adsorption processes occur simultaneously was developed. To investigate the adsorption mechanism, diffraction techniques were employed to localize the organics adsorbed into the zeolite structure. The information gathered by this latter investigation – in cooperation with the Earth Science Department UNIFE - allows to define the interactions between organic molecules and zeolite framework. Finally, adsorption on mesoporous materials was investigated. It is well known that water is contaminated by different classes of substances, and zeolites are mainly suitable for molecules with dimensions comparable to that of their pores. However, many compounds belonging to the class of emergent contaminants have large molecular dimensions, and in such cases mesoporous materials can be more efficient than zeolites. To accomplish this task MCM-41 and HMS were synthesized and characterised – this work was carried out at the ‘Institut Charles Gerhardt (ICG), Matériaux Avancés pour la Catalyse et la Santé (MACS)’ at Montpellier (France) with the supervision of Prof. Francesco di Renzo and Dr. Anne Galarneau – and then the adsorption of acid perfluorooctanoic onto these mesoporous materials was performed.
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Schwedes, Oliver. "The failure of integrated transport policy in Germany: a historical perspective." Elsevier, 2010. https://publish.fid-move.qucosa.de/id/qucosa%3A36359.
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In order to reach a sustainable traffic development, the European Union follows the central idea of an integrated transport policy. In contrast to the widely accepted concept, the EU recently had to admit that in fact transport development goes in the opposite direction. This contradiction has to be explained. The article describes the long lasting succession of efforts to implement a far-reaching cooperation in the transport sector as is aspired to by an integrated transport policy. In each case, though, the political idea of cooperation was superseded by the economic one of competition. Therefore, the author argues in favour of a detailed scientific analysis of the necessary political conditions for an integrated transport policy, instead of continuing an untested concept.
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Wan, Cheuk-wai, and 尹卓偉. "Intra-modal competition of public transport services in Hong Kong: a case study of bus service provision." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31261164.
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Chu, Kut-fai Michael, and 朱吉輝. "Speed competition in an affluent and densely-populated city: a case study of bus transport in HongKong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B42128493.
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黃蔚琛 and Wai-sum May Wong. "Public light bus service in a challenging transport environment." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B31633109.
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Chu, Kut-fai Michael. "Speed competition in an affluent and densely-populated city : a case study of bus transport in Hong Kong /." Click to view the E-thesis via HKUTO, 1997. http://sunzi.lib.hku.hk/hkuto/record/B42128493.
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Cole, Peter. "Urban rail perspectives in Perth, Western Australia: modal competition, public transport, and government policy in Perth since 1880." Thesis, Cole, Peter (2000) Urban rail perspectives in Perth, Western Australia: modal competition, public transport, and government policy in Perth since 1880. PhD thesis, Murdoch University, 2000. https://researchrepository.murdoch.edu.au/id/eprint/660/.
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The decline of public transport in Western Australia is observed in four separate historical studies which narrate the political and administrative history of each major urban transport mode. Perth's suburban railway system is examined as part of the State's widespread rail network, including the extravagantly-equipped short-lived suburban railway in Kalgoorlie. Political interference in early railway operations is studied in detail to determine why Perth's rail-based public transport systems were so poorly developed and then neglected or abandoned for much of the twentieth century. The llnique events in Kalgoorlie at the turn of the century are presented as potent reasons for the early closure of Perth's urban tramway system and the fact that no purpose-built suburban railways were constructed in Perth until 1993. The road funding arrangements of the late nineteenth century are considered next, in order to demonstrate the very early basis for the present lavish non-repayable grants of money for road construction and maintenance by all three layers of government. The development of private and government bus networks is detailed last, with particular attention paid to the failure of private urban bus operators in the 1950s and the subsequent formation of a government owned and operated urban bus monopoly. The capital structure and accounting practices of public transport modes are analysed to provide a critique of popular myths concerning the merits of each. In order to obtain an impression of the changing political view of different transport modes, the attitude of politicians to public transport and the private motor car over the last one hundred and twenty years is captured in summary narrations of some of the more important parliamentary transport debates. Two possible explanations of public transport decline are discussed in conclusion; one relying a neoclassical economic theory of marginal pricing, and the other on an observation on the fate of large capital investments in the modern party-based democratic system of government.
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Cole, Peter. "Urban rail perspectives in Perth, Western Australia : modal competition, public transport, and government policy in Perth since 1880." Murdoch University, 2000. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20061122.125641.
Full textAbstract:
The decline of public transport in Western Australia is observed in four separate
historical studies which narrate the political and administrative history of each major
urban transport mode. Perth's suburban railway system is examined as part of the State's
widespread rail network, including the extravagantly-equipped short-lived suburban
railway in Kalgoorlie. Political interference in early railway operations is studied in
detail to determine why Perth's rail-based public transport systems were so poorly
developed and then neglected or abandoned for much of the twentieth century. The
llnique events in Kalgoorlie at the turn of the century are presented as potent reasons for
the early closure of Perth's urban tramway system and the fact that no purpose-built
suburban railways were constructed in Perth until 1993. The road funding arrangements
of the late nineteenth century are considered next, in order to demonstrate the very early
basis for the present lavish non-repayable grants of money for road construction and
maintenance by all three layers of government. The development of private and
government bus networks is detailed last, with particular attention paid to the failure of
private urban bus operators in the 1950s and the subsequent formation of a government
owned and operated urban bus monopoly. The capital structure and accounting
practices of public transport modes are analysed to provide a critique of popular myths
concerning the merits of each. In order to obtain an impression of the changing political
view of different transport modes, the attitude of politicians to public transport and the
private motor car over the last one hundred and twenty years is captured in summary
narrations of some of the more important parliamentary transport debates. Two possible
explanations of public transport decline are discussed in conclusion; one relying a neoclassical
economic theory of marginal pricing, and the other on an observation on the fate
of large capital investments in the modern party-based democratic system of
government.
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Bertho, Fabien. "The impact of liner shipping trade and competition regulations on the market structure, maritime transport costs and seaborne trade flows." Paris, Institut d'études politiques, 2012. http://spire.sciences-po.fr/hdl:/2441/7o52iohb7k6srk09mit038srm.
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J’évalue l’impact des réglementations commerciales et concurrentielles dans transport maritime de ligne sur la structure du marché, les coûts de transport et le commerce maritime. D’abord, je quantifie le niveau global des Barrières Commerciales (BC) dans le secteur du transport maritime de ligne en construisant un Indice de Restriction du Commerce des Services (IRCS). Cet indicateur est inclus dans une analyse économétrique en deux étapes. Les BC sont susceptibles d’influencer le commerce maritime à travers les Coûts de Transport Maritime (CTM). Ainsi, j’évalue l'impact des BC sur les CTM, puis l'impact des CTM sur le commerce maritime. Je montre que les BC ont un impact positif sur les CTM et que les CTM ont un impact négatif sur le commerce maritime. Ainsi, les BC ont un impact indirect négatif sur le commerce maritime. Je montre aussi qu’en plus d’affecter négativement le commerce maritime à travers les CTM, la distance a un impact positif direct sur le commerce maritime. Ensuite, j’évalue l'impact des barrières réglementaires à l'entrée sur la structure du marché et les CTM. D’abord, j’évalue l'impact de la réglementation sur la structure du marché. Puis, j’évalue l'impact de la structure du marché sur les CTM. Je montre que la présence de conférences maritimes n’a pas d’impact sur le nombre de compagnies sur les routes alors que la présence d'accords de discussion a un impact positif. De plus, lorsqu’elles atteignent un seuil, les BC ont un impact négatif sur le nombre de compagnies. En outre, je montre les BC affectent les CTM à travers la structure du marché et les coûts marginaux. Enfin, je montre que les compagnies maritimes de ligne exercent un pouvoir de marchéThis dissertation aims at assessing the impact of liner shipping trade and competition regulations on the market structure, prices, and seaborne trade flows. To quantify the overall level of trade restrictions in the liner shipping sector, I construct an original Service Trade Restrictiveness Index (STRI). The original STRI is included in a two-stage econometric analysis. Since barriers to trade are likely to influence seaborne trade through maritime transport costs (MTCs), in a first stage, I assess the impact of trade restrictions on MTCs. And, in a second stage I assess the impact of MTCs on seaborne trade flows. I show that barriers to trade affect positively MTCs and that MTCs affect negatively seaborne trade flows. Thus, barriers to trade have an indirect and negative impact on seaborne trade flows. Furthermore, I show that distance affects positively MTCs. The results also suggest that besides affecting negatively seaborne trade through MTCs, distance affect directly and positively seaborne trade. I assess the impact of regulatory barriers to entry on the market structure and MTCs. In a first stage, I assess the impact of regulations on the market structure. In a second stage, I assess the impact of the market structure on MTCs. I show that the presence of maritime conferences does not affect the number of carriers on routes while the presence of discussion agreements does. Moreover, when they reach a critical level, barriers to trade limit the number of carriers. Furthermore, I show barriers to trade affect MTCs through the market structure and marginal costs. Finally, I show that shipping exercise a market power even though this effect is small
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Hammad, Mohanad. "Le désenclavement maritime de l'Irak : perspectives de compétitivité et capacités concurrentielles." Thesis, Paris 4, 2017. http://www.theses.fr/2017PA040058.
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Bassora se situe au fond du golfe Arabique. L’Irak ne possède qu’une modeste bande littorale sur le golfe Arabique, d’une longueur de 58 km, qui lui permet de donner sur le monde. Cette côte a une influence importante sur le commerce local comme sur le commerce extérieur de l’Irak étant donné qu’elle accueille les navires chargés de marchandises venant de divers pays, ainsi que l’exportation du pétrole. Cette situation a créé beaucoup d’opportunités comme elle a suscité des périls. Durant les deux dernières décennies, les ports irakiens ont connu une forte concurrence de la part des ports de pays voisins (Koweït, Jordanie, Syrie, Arabie Saoudite, Iran, Émirats Arabes Unis) qui ont fait des progrès et des développements remarquables, alors que, au contraire, la performance et l’efficacité des ports irakiens ont diminué au cours de la même période à cause des guerres des années 1980-2000 (avec la 1ère, la 2e et la 3e guerre du Golfe). Parmi les causes qui ont affaibli et causé un grand tort aux ports irakiens, il faut relever en particulier le blocus économique qui a été imposé à l’Irak durant 13 ans. Ce qui a incité le pays à utiliser les ports des pays voisins, tels que le port commercial d’Aqaba, pour importer et exporter des marchandises. Suite à l’ouverture économique de l’Irak après 2003, le pays a eu besoin de ports efficaces et efficients pour accueillir les navires avec des services attractifs et une bonne qualité de service. L’amélioration de leur compétitivité est alors devenue une nécessité. La thèse positionne la problématique irakienne dans le champ scientifique de la géographie des transports, dont elle utilise les concepts. Elle se place dans le champ général de l’émergence pour inscrire le cas particulier de l’Irak dans une réflexion qui vise à démontrer que, malgré un contexte encore dominé par des facteurs négatifs, la rationalité du monde des transports et de la logistique peut imposer un scénario de croissance sinon de développement durable. Par conséquent, cette étude vient révéler les possibilités des ports irakiens actuels. Elle s’intéresse aux problèmes et aux obstacles qu’ont connus les ports irakiens, ainsi qu’à l’analyse de leur compétitivité actuelle et à leurs perspectives d’avenir. De grands travaux sont nécessaires. L’organisation interne des ports doit également être revue. En construisant le port de Fao, qui est une étape essentielle pour l’amélioration de la compétitivité de l’Irak et en réponse aux exigences du commerce mondial, le pays relève la tête. Son but est d’entrer dans la compétition, non seulement en revoyant son schéma portuaire, mais également en développant des stratégies d’arrière-pays et de corridors multimodaux. Ainsi, avec Bassora-Fao, et en dépassant les seules logiques pétrolières, l’Irak peut retrouver une place dans le mondeBasrah in the bottom of the Arabian Gulf. Iraq possesses a small 58km-coastline in the Arabian Gulf which gives the country a strategic view of the world. This side has a vital influence on the Iraqi local market as well as the global one since imports goods from various countries and mainly exports oil. Such a condition has triggered great opportunities, but it has unfortunately caused perils. During the last two decades, Iraqi ports have witnessed a tough competition with neighbor countries’ ports (Kuwait, Jordan, Syria, Saudi Arabia, Iran, United Arab Emirates) who have been through noticeable development and progress while , the performance and efficiency of the Iraqi ports decreased during the same period because of the wars Iraq has conducted between 1980-2000 (1st , 2nd and 3rd Gulf war) . One of the causes which has weakened and caused shortcoming to the Iraqi ports is the economic blockade which has been imposed on Iraq for 13 years. This eventually forced Iraq to resort to neighbor countries’ ports goods such as the commercial port of Aqaba in order to import and export. Due to Iraqi economic prosperity after 2003, the country was in urgent need of affective and efficient ports that would enable it to host ships with attractive and high-quality services. Enhancing their competitiveness has thus became of great importance.This paper locates the Iraqi problematic in the scientific field of the geography of transport of the concept of which is seeks to rely on. It is framed within the emergency context to to include the particular case of Iraq in a reflection which aims to demonstrate that, despite a context still dominated by negative factors, the rationality of the world of transport and logistics can Impose a scenario of growth if not of sustainable development. Therefore, this survey proposes to reveal the possibilities of actual Iraqi ports It aims to study both the problems and obstacles that the Iraqi ports have witnessed and the actual actual competitiveness and for their future perspectives. A huge amount of work isis, accordingly, deemed necessary.The internal organization of ports needs to be examined. With the building of Fao port, which is an essential step towards the enhancement of Iraq’s competiveness and a response to the requirements of global market, Iraq holds its head high. Its goal is to enter the competition, not only by reexamining its port schema , but , in fact , by developing backcountry strategies and multimodal corridors. Furthermore, with Al-Basrah –Fao and through going beyond the oil logics alone, Iraq can find a maritime opening on the world
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Trapote, Barreira César. "Methodology for optimal design of efficient air transport network in a competitive environment." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/350317.
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This thesis aims to dissert about air transport network design taking into consideration the current needs about efficiency in a very competitive industry. The main focus for this work is the airline's point of view and for this reason is going to be common to talk about profitability.
A methodology is proposed to analyse current networks and to introduce modifications. First, an analytical approach is proposed with the aim to understand better the interaction of key parameters in network design at strategical level. Analyitical models demonstrate to be very useful because with a few parameters it is possible to decide if point to point or hub and spoke configuration suits better for an airline, given a set of supply conditions. Furthermore, the performance of networks with stopover configuration is tested, basically because for long routes with low demand this newtorks work well, how it was demonstrated by public transport systems. The differenciation of this research, compared against previous studies, is to include the performance of new entrant airlines in the industry. This aspect is carried out evaluating accurately the impact of fixed costs in the evaluation of cost operators. Despite airlines tend to consider aircraft ownership costs and labor costs as variable ones, they are not. They had an important impact in profit and loss account. A bad utilitzation factor of airplane or crew staff is very undesirable for operator and it can consider do not operate new routes if the resources are not well used.
Secondly, analytical models are powerful but it is not possible to evaluate accurately the daily operational aspects for real networks with real flight schedules because these models take into consideration average values of some parameters. For this reason, this thesis develops a Tabu search algorithm to carry out airline network planning, based on linear models of each different planning problem. To do this contribution, these models are developed before for linear programming and they are solved with a combination of complete enumeration algorithm and exhaustive search algorithm. Both algorithms provide exact solution or global optimum for any problem statement. Later, Tabu search algorithm improves performance of searching with lower computational cost. The main conclusion is that Tabu developed is a better tool for airline planning than exact techniques because of lower times of computation. This performs better for large networks that, finally, are real networks. However, exact techniques could be interesting for small airlines that can be start-ups.
Third, one of main reasons to develop a quantification of costs for managing airlines is due to the problem of complexity in networks. With the growth of air transportation and congestion at airports, primary or reactionary delays become higher day after day. Reactiveness of network depends of configuration and planning. Airlines manages it with extra reources, one way is allocating buffer times in flight schedule and other is having aircrafts at ground at main bases to enter in service and recover flight plans. Airline network design, planning and efficient algorithms are key assets to provide robustness for airlines.
Finally, driving airlines in high competitive environments are difficult. Running low costs is the main decision for managers. However, analysing the problem from theory game point of view, allows finding key reasons to support this argument. First, a Stakelberg model is defined for two competing airlines. This model demonstrates that a war on frequencies or fares damages both competitors. Furthermore, a Cournot model it is shown and it proposes a navigation fee attending to correct utilization of capacity. Both models are a theoretical framework but demonstrate consistency and encourage further investigations.El diseño de redes de transporte aéreo es un factor clave de eficiencia en una industria altamente competitiva. A pesar de que la rentabilidad es de suma importancia, el sistema considera la experiencia del usuario y los beneficios sociales para obtener un óptimo global. Un enfoque analítico permite derivar principios de diseño de redes de transporte aéreo: la tesis muestra cómo unas pocas variables y sus interacciones explican los factores clave del diseño de la red a nivel estratégico. Los servicios punto-a-punto muestran supremacía en las redes simples y para demandas altas y compensadas, una configuración con escalas es adecuada para rutas lejanas con poca demanda, y las operaciones hub and spoke mejoran las dos estrategias anteriores para redes grandes, cuando la demanda es baja o cuando las frecuencias son altas, pero son más sensibles a la propagación de demoras. El enfoque analítico permite prever el comportamiento de nuevas compañías aéreas entrando en el sector. El modelo incluye costes fijos de propiedad del avión y laborales (al contrario de las hipótesis habituales de la industria, que trabaja con costes variables), puesto que tienen un impacto importante en la cuenta de resultados. Una vez se han derivado guías de diseño, la tesis formula un planteamiento más realista del diseño de redes de transporte aéreo basado en programación matemática lineal, que se resuelve con una combinación del Algoritmo de Enumeración Completa y el Algoritmo de Búsqueda Exhaustiva (ambos proporcionan la solución exacta o un óptimo global para cualquier planteamiento del problema). El modelo incluye asignación de flotas, rutas de aeronaves y programación de tripulaciones. Mientras que los algoritmos exactos son apropiados para aerolíneas pequeñas, los problemas más grandes necesitan Búsqueda Tabú. El crecimiento del transporte aéreo y la congestión en los aeropuertos (a veces propiciada por las operaciones hub&spoke) pueden afectar las demoras con un efecto de bola de nieve o látigo; sin embargo el análisis de la complejidad de la red aérea puede incrementar la resiliencia de las operaciones. Un buen diseño de la red aérea, una buena planificación y unos algoritmos eficientes, son aspectos clave para proporcionar fiabilidad a las aerolíneas y así reducir los recursos inactivos asociados a “colchones de tiempo” (en los horarios de los vuelos) y/o en aviones “de reserva” en la plataforma para recuperar planes de vuelo. El “acolchado” mejora la percepción de la calidad por parte del pasajero, pero con un control activo del horario de vuelos puede conseguirse la misma percepción con costes menores. El entorno competitivo de las aerolíneas se analiza con teoría de juegos: un modelo de Stakelberg para dos aerolíneas competidoras muestra que una guerra de frecuencias o tarifas es perjudicial para ambas aerolíneas. Un modelo Cournot propone una tasa de navegación y de congestión según la correcta utilización de la capacidad. Vuelos (de la misma alianza) a lo largo del mundo con escalas en los hubs principales se proponen como investigación futura
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Morimoto, Yu. "Economic Analysis of Policies on Air-transportation Market." Kyoto University, 2016. http://hdl.handle.net/2433/215277.
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Tillman, Peter. "Carrier selection criteria for Scandinavian domestic road transport : A study of the competition between Scandinavian and Eastern European hauliers in a scenario without restrictions on cabotage." Thesis, Internationella Handelshögskolan, Högskolan i Jönköping, IHH, Centre of Logistics and Supply Chain Management, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-19668.
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The European Commission has for some time indicated a desire to remove the remaining restrictions on cabotage. Such liberalization is expected to result in significant changes on some domestic road transport markets. The Scandinavian markets are among these and the local hauilers fear that the lower wages of Easter European hauliers will leave them out of business. In this thesis a scenario of full cabotage liberalization is assumed. Representatives from associations with interest within the Scandinavian road transport markets has been approached with a qualitative survey on carrier selection criteria. Respondents are asked to determine the importance of the criteria, as well as the relevance to the competition between Scandinavian and Eastern European hauliers. Finally they are asked to assess whether the advantage of each criterion lies with Scandinavian or Eastern European hauliers. The qualitative orientation of the survey is achieved though justification and follow up questions. Reliability of pickups and deliveries is still regarded the most important criteria. Also competitive prices received a high rating. It is concluded that the significant price difference between Scandinavian and Eastern European hauliers will benefit Eastern European hauliers considerably in the competition for the simple “from A to B” shipments. For more complicated shipments, entailing a higher level of service, communication and supply chain integration, the local hauliers are expected to stand their ground.
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Borsati, Mattia. "Empirical Essays on Transport and Regional Economics: Safety, Intermodality, and Commuting Dynamics." Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/268170.
Full textAbstract:
The following doctoral thesis, sponsored by Autostrada del Brennero S.p.A. (an Italian highway concession company in charge of managing toll roads) consists on empirical essays at the crossroad between transport and regional economics. They focus on different aspects that directly involve motorways (i.e, safety, intermodality, and commuting dynamics) and they are aimed at providing further evidences that transport institutions and policy makers could take into account throughout their decision-making processes.
The first chapter presents a research article that seeks to determine the impact of an average speed enforcement system in reducing highway accidents. Indeed, at the end of 2005, Autostrade per l'Italia (ASPI) and the Italian traffic police progressively deployed along the Italian tolled motorway network an average speed enforcement system, named Safety Tutor, able to determine the average speed of vehicles over a long section to encourage drivers to comply with speed limits and improve safety. To empirically test the extent to which Safety Tutor led to a reduction in both total and fatal accidents on Italian highways during the period of 2001-2017, we carried out a generalized difference-in-differences estimation using a unique panel dataset that exploits the heterogeneous accident data within all tolled motorway sectors in a quasi-experimental setting. To deal with the potential endogeneity of the non-random placement of Safety Tutor sites, we utilized an instrumental variable strategy by using the network of motorway sectors managed by ASPI and its controlled concessionaires from 2005 onwards (i.e., when the technology was available) as an instrument to predict Safety Tutor adoption. We found that a 10% increase in Safety Tutor coverage led to an average reduction in total accidents of 3.9%, whereas there is no evidence of a significant causal effect of Safety Tutor in reducing fatal accidents.
The second chapter presents a research article that seeks to investigate the inter-modal competition between motorway and high-speed rail (HSR) services, as the extent to which HSR demand could be the result of a modal shift from motorways is a relevant issue in any cost-benefit analysis of HSR investments. Indeed, the development of HSR has had a notable impact on modal market shares on the routes on which its services have been implemented. To analyse whether the HSR expansion in Italy has led to a modal shift from motorway to HSR, we empirically test i) whether HSR openings adjacent to motorway sectors have reduced the total km travelled by light vehicles on these sectors during the period 2001-2017; and ii) whether this reduction has been persistent or even more evident after the opening of on-track competition between two HSR operators. To do so, we carried out a generalized difference-in-differences estimation, using a unique panel dataset that exploits the heterogeneous traffic data within all tolled motorway sectors in a quasi-experimental setting. Our findings reveal that neither HSR openings nor the opening of on-track competition led to a modal shift from motorway to HSR services, as the two transport modes are non-competing. Conversely, HSR expansion had a slightly positive impact on motorway traffic.
The third chapter presents a data article in a “data in brief” format that describes a dataset on municipality-to-municipality commuting patterns in Italy over the 1991, 2001, and 2011 censuses aimed at investigating the role of transport infrastructures and the structural transformation of the economy on worker mobility. At this purpose, a core origin-destination dataset on the number of workers moving between municipalities, or within the same municipality, has been linked with further municipality covariates on jobs location, population, and the distances in meters and journey times in minutes between all municipalities. Even though these data are freely available online, they require some tedious work to organize. Therefore, this data article brings the necessary information together and makes the dataset available on request. The dataset offers applied researchers an alternative source of information to shed new lights on the changing shape of urban systems by analysing i) the impact of infrastructural endowment in providing better job accessibility, or ii) the connection between increasing commuting patterns and the structural transformation of the economy due to the tertiarization process from 1991 to 2011.
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Borsati, Mattia. "Empirical Essays on Transport and Regional Economics: Safety, Intermodality, and Commuting Dynamics." Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/268170.
Full textAbstract:
The following doctoral thesis, sponsored by Autostrada del Brennero S.p.A. (an Italian highway concession company in charge of managing toll roads) consists on empirical essays at the crossroad between transport and regional economics. They focus on different aspects that directly involve motorways (i.e, safety, intermodality, and commuting dynamics) and they are aimed at providing further evidences that transport institutions and policy makers could take into account throughout their decision-making processes.
The first chapter presents a research article that seeks to determine the impact of an average speed enforcement system in reducing highway accidents. Indeed, at the end of 2005, Autostrade per l'Italia (ASPI) and the Italian traffic police progressively deployed along the Italian tolled motorway network an average speed enforcement system, named Safety Tutor, able to determine the average speed of vehicles over a long section to encourage drivers to comply with speed limits and improve safety. To empirically test the extent to which Safety Tutor led to a reduction in both total and fatal accidents on Italian highways during the period of 2001-2017, we carried out a generalized difference-in-differences estimation using a unique panel dataset that exploits the heterogeneous accident data within all tolled motorway sectors in a quasi-experimental setting. To deal with the potential endogeneity of the non-random placement of Safety Tutor sites, we utilized an instrumental variable strategy by using the network of motorway sectors managed by ASPI and its controlled concessionaires from 2005 onwards (i.e., when the technology was available) as an instrument to predict Safety Tutor adoption. We found that a 10% increase in Safety Tutor coverage led to an average reduction in total accidents of 3.9%, whereas there is no evidence of a significant causal effect of Safety Tutor in reducing fatal accidents.
The second chapter presents a research article that seeks to investigate the inter-modal competition between motorway and high-speed rail (HSR) services, as the extent to which HSR demand could be the result of a modal shift from motorways is a relevant issue in any cost-benefit analysis of HSR investments. Indeed, the development of HSR has had a notable impact on modal market shares on the routes on which its services have been implemented. To analyse whether the HSR expansion in Italy has led to a modal shift from motorway to HSR, we empirically test i) whether HSR openings adjacent to motorway sectors have reduced the total km travelled by light vehicles on these sectors during the period 2001-2017; and ii) whether this reduction has been persistent or even more evident after the opening of on-track competition between two HSR operators. To do so, we carried out a generalized difference-in-differences estimation, using a unique panel dataset that exploits the heterogeneous traffic data within all tolled motorway sectors in a quasi-experimental setting. Our findings reveal that neither HSR openings nor the opening of on-track competition led to a modal shift from motorway to HSR services, as the two transport modes are non-competing. Conversely, HSR expansion had a slightly positive impact on motorway traffic.
The third chapter presents a data article in a “data in brief” format that describes a dataset on municipality-to-municipality commuting patterns in Italy over the 1991, 2001, and 2011 censuses aimed at investigating the role of transport infrastructures and the structural transformation of the economy on worker mobility. At this purpose, a core origin-destination dataset on the number of workers moving between municipalities, or within the same municipality, has been linked with further municipality covariates on jobs location, population, and the distances in meters and journey times in minutes between all municipalities. Even though these data are freely available online, they require some tedious work to organize. Therefore, this data article brings the necessary information together and makes the dataset available on request. The dataset offers applied researchers an alternative source of information to shed new lights on the changing shape of urban systems by analysing i) the impact of infrastructural endowment in providing better job accessibility, or ii) the connection between increasing commuting patterns and the structural transformation of the economy due to the tertiarization process from 1991 to 2011.
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Tantikul, Kiattipon. "The possibility of achieving US and EU air transport agreement in terms of competition in the transatlantic aviation market: Third party country perspectives." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=87021.
Full textAbstract:
The development of an international aviation industry has resulted in bilateral agreements playing an increasingly significant role as instruments of negotiation and cooperation between and among States parties. The US and EU Air Transport Agreement has become an outstanding bilateral agreement for a new era of a global aviation industry. A variety of ongoing controversial issues concerning air transport sector might be expectedly solved by the exclusive negotiations between the two counterparts. The successful outcomes of the Agreement have been anticipated not only by the two parties, but also by the other third party countries.This thesis will explore the feasibility of achieving US and EU Air Transport Agreement in terms of competition, from the perspective of third party country. In this regard, the similarities and differences in the competition policies and laws of the parties will be identified, compared and used for analyzing the achievement of the Agreement.
Le développement de l'industrie aéronautique a conduit à la signature d'accords bilatéraux, qui jouent un rôle croissant comme instruments de négociation entre les Etats parties. L'accord sur le transport aérien signé entre l'Union Européenne et les Etats-Unis, est devenu un accord bilatéral de premier plan, qui marque une nouvelle ère de l'industrie aéronautique mondiale. De nombreux problèmes actuels controversés relatifs au domaine du transport aérien, pourraient normalement être résolus par des négociations exclusives entre les deux parties en présence. Les retombées positives de l'accord ont été prévues non seulement par les deux parties, mais également par les pays tiers.
Cette thèse étudiera la possibilité de parvenir à un accord sur le transport aérien entre l'UE et les Etats-Unis, en matière de concurrence, du point de vue d'un pays tiers. Dans cette perspective, les similitudes et les différences entres les règles et lois concurrentielles seront identifiées, comparées et utilisées afin d'analyser la réalisation de l'accord.
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Lévêque, Julien. "Réguler les chemins de fer sur une proposition de la nouvelle économie de la réglementation : "la concurrence par comparaison" (yardstick competition)." Phd thesis, Université Lumière - Lyon II, 2005. http://tel.archives-ouvertes.fr/tel-00012043.
Full textAbstract:
La libéralisation des marchés impose aux chemins de fer une révolution économique. Elle remet en cause l'organisation monopolistique au profit du développement de nouveaux marchés. L'analyse des défaillances du marché (notamment évaluation des économies d'échelle) et celle des différentes formes de réglementation justifient le recours à une régulation incitative des marchés ferroviaires. A ce titre, la concurrence par comparaison paraît intéressante : la comparaison des performances d'entreprises semblables permet de réduire les contraintes informationnelles de la régulation classique. Malgré quelques limites théoriques, les mises en œuvre de mécanismes comparatifs sont nombreuses, comme, par exemple, dans les chemins de fer Japonais. L'application proposée de la concurrence par comparaison aux TER français doit en améliorer la performance. En effet, l'estimation d'une frontière de coût révèle d'importantes disparités d'efforts entre les régions (représentant plus de 100 millions d'euros par an), que le mécanisme comparatif proposé peut réduire.
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Sioulas, Andreas. "The relevant market : From an air passenger perspective." Thesis, Jönköping University, JIBS, Commercial Law, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-12221.
Full textAbstract:
This thesis intends to analyze and clarify the relevant market within air passenger transport. Further the thesis intends to investigate if there is any difference in air passenger transport in accordance to more general business. The definition of the relevant market is an essential step in order to establish a breach under European competition law. The relevant market includes the relevant product market and the relevant geographic market. The fundamental issue in the relevant product market is whether products are considered to be substitutable and can constitute the same market. The Commission has set a notice which includes methods and criterias and serves as guidelines to courts and companies to define the relevant market. The notice is however not binding for courts. The CJ have developed implementation of the criterias which it tends to refer to even if it is a different branch, however a case-by-case based definition is needed. The definition of the relevant market is based on three main criterias: demand substitutability, supply substitutability and potential competition. Even though the supply substitutability seems not be implemented in a further extension in more general branches, it seems to be of greater importance when defining the relevant market within air passenger transport. The air passenger transport has also established a test called base of origin and base of destination which includes an analysis of price, travel frequencies, comfort of the journey, transfer time to terminals and differences in the qualities and quantities in airports. However according to air passenger transport, travel sequences seems to be the criteria that courts focus most on.