Дисертації з теми "Difference-in-difference model"
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Scherbov, Sergei, and Dalkhat Ediev. "Does selection of mortality model make a difference in projecting population ageing?" Max Planck Institute for Demographic Research, 2016. http://dx.doi.org/10.4054/DemRes.2016.34.2.
Повний текст джерелаSawyer, Jason. "Crossing Boundaries: Building a Model to Effectively Address Difference in Community Practice." VCU Scholars Compass, 2014. http://scholarscompass.vcu.edu/etd/3455.
Повний текст джерелаMcInerney, David J. "A triangular grid finite-difference model for wind-induced circulation in shallow lakes /." Title page, table of contents and abstract only, 2005. http://web4.library.adelaide.edu.au/theses/09PH/09phm4790.pdf.
Повний текст джерелаPeluso, Alina. "Novel regression models for discrete response." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/15581.
Повний текст джерелаKing-Smith, Leah. "Resonances of difference : creative diplomacy in the multidimensional and transcultural aesthetics of an indigenous photomedia practice." Thesis, Queensland University of Technology, 2006. https://eprints.qut.edu.au/16321/1/Leah_King-Smith_Thesis.pdf.
Повний текст джерелаKing-Smith, Leah. "Resonances of difference : creative diplomacy in the multidimensional and transcultural aesthetics of an indigenous photomedia practice." Queensland University of Technology, 2006. http://eprints.qut.edu.au/16321/.
Повний текст джерелаStone, Peter (Peter Robert). "A new model for electric force microscopy and its application for electrostatically generated phase difference in tapping mode AFM." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32855.
Повний текст джерелаIncludes bibliographical references (leaf 37).
The harmonic force balance method was used to model and simulate electric force microscopy (EFM) and electrostatically generated phase difference in tapping mode AFM (EPTA) measurements. Simulations show that the harmonic force balance approach matches and explains EFM and EPTA experimental results well. Simulations also show that the model depended on both geometric and materials parameters. The harmonic force balance model was subsequently used to directly simulate a previously performed EPTA experiment. Data obtained from the model showed a remarkable similarity to the experimentally obtained data, thus validating the use of the harmonic force balance model to simulate EPTA data.
by Peter Stone.
S.B.
Jahng, Seungmin Kolenikov Stanislav. "A mixed model for variance of successive difference of stationary time series modeling temporal instability in intensive longitudinal data /." Diss., Columbia, Mo. : University of Missouri--Columbia, 2008. http://hdl.handle.net/10355/6279.
Повний текст джерелаWewel, Solvejg Andrea. "Essays in Household Economics and Econometrics." Thesis, Boston College, 2018. http://hdl.handle.net/2345/bc-ir:107901.
Повний текст джерелаMy doctoral research comprises both structural empirical work in the field of household economics (Chapters 1 and 3) and reduced-form theoretical work in econometrics (Chapter 2). The first chapter quantifies consumption gains in the form of consumption expenditure savings for couples living together versus apart. Moreover, I comprehensively analyze the key drivers of heterogeneity in consumption gains across couples. The second chapter, which is joint work with Stefan Hoderlein, develops the first difference-in-differences model for binary choice outcome variables when treatment effects are heterogeneous. Finally, in the third chapter, I study the realized gains in consumption levels upon move-in from single to couple and move-out from couple to single, separately by gender. Chapter 1. In “Heterogeneity in Consumption Gains from Living Together as a Couple”, I estimate consumption gains from living together versus apart. Specifically, this chapter quantifies these gains from consumption economies of scale for married as well as unmarried cohabiting couples in the U.S. I also comprehensively analyze the determinants of heterogeneity in consumption gains. For this purpose, I extend a recent collective household model to incorporate heterogeneity in consumption economies of scale and perform structural estimation using data from the Panel Study of Income Dynamics (PSID). I find that couples living together save an average of 14 percent in annual consumption expenditures compared to their counterfactual spending when living apart. Moreover, older couples and homeowner couples experience higher consumption economies of scale and thus higher consumption gains. I do not detect marital status to be a determining factor. These results have implications for appropriate adjustment of poverty thresholds across households of different sizes. Chapter 2. In “Binary Choice Difference-in-Differences Model with Heterogeneous Treatment Effects”, we develop the first Difference-in-Differences Model for binary choice outcome variables when treatment effects are heterogeneous. Our main result establishes identification of the average treatment effect on the treated (ATT). Moreover, we present two extensions. First, we show identification of the joint distribution of the actual and counterfactual latent outcome variable in the treatment group. Second, we extend the basic model to allow for the inclusion of covariates. We suggest an estimator for the ATT and evaluate its finite sample properties with the help of Monte Carlo simulations. Chapter 3. In “Realized Consumption Gains from Living Together as a Couple by Gender”, I am among the first to analyze how consumption gains from living together as a couple are split between men and women and whether this varies by individual-level or couple-level observables. Understanding individual-level consumption gains is important for rationalizing marriage and cohabitation decisions on the micro-level, and marriage and cohabitation patterns on the macro-level. I use the extended collective household model from Chapter 1 and data from the PSID to estimate male and female realized consumption gains from moving in as a couple and moving out of a couple. Average realized consumption gains upon move-in are positive for women and negative for men. This reverses for dissolving couples. Lastly, individuals who move in with their spouse have higher realized consumption gains than individuals who decide to cohabit without a marriage certificate
Thesis (PhD) — Boston College, 2018
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Economics
Cavayero, Chloe N. "The use of the developmental individual difference relationship-based (DIR) model on a child with autism in the classroom environment." Honors in the Major Thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/1245.
Повний текст джерелаBachelors
Office of Undergraduate Studies
Interdisciplinary Studies
Parameswaran, Sreeja. "Solar Energy Conversion in Plants and Bacteria Studied Using FTIR Difference Spectroscopy and Quantum Chemical Computational Methodologies." Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/phy_astr_diss/32.
Повний текст джерелаEck, Johanna, and Johansson Sofie. "Social media acceptance in B2B marketing : A study exploring the reasons behind the difference in social media usage between B2B and B2C markets." Thesis, Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-79891.
Повний текст джерелаSociala medier är en snabbt växande plattform när det kommer till marknadsföring. Det används dock i större utsträckning av business-to-consumer (B2C) företag än av business-to-business (B2B) företag. På grund av detta har det gjorts betydligt mindre forskning gällande marknadsföring på sociala medier för B2B än vad som har gjorts för B2C. Denna studie utforskar varför marknadsföring på sociala medier är mindre vanligt i B2B än B2C. Detta har gjorts genom att genomföra 11 intervjuer, öga-mot-öga, med personer som arbetar på olika B2B-företag och som har inflytande över sitt respektive företags marknadsföringsprocess. För att analysera och utvärdera resultaten från denna studie användes Technology Acceptance Model (TAM), en modell som mäter acceptansen av olika tekniska plattformar. Genom att identifiera de externa variabler som hindrar B2B-företag från att använda sociala medier analyserades användbarheten och användarvänligheten, som den uppfattas av dem intervjuade, för att undersöka vad som påverkar skillnaden i sociala media acceptans i marknadsföringssyfte mellan B2C- och B2B-företag. Resultaten av denna studie visar att den upplevda användarvänligheten är den dominerande faktorn som hindrar B2B-företag från att använda sociala medier för marknadsföringssyften. Detta är dock inte orsaken till skillnaden mellan B2B och B2C. Skillnaden kan istället förklaras av en negativare uppfattning av användbarheten av marknadsföring på sociala medier. Denna negativa uppfattning är ett resultat av egenskaperna hos sociala medier, den bransch som företaget är verksam inom, samt företagets produkter och kunder.
Johansson, Sofie, and Johanna Eck. "Social media acceptance in B2B marketing : A study exploring the reasons behind the difference in social media usage between B2B and B2C markets." Thesis, Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-79893.
Повний текст джерелаSociala medier är en snabbt växande plattform när det kommer till marknadsföring. Det används dock i större utsträckning av business-to-consumer (B2C) företag än av business-to-business (B2B) företag. På grund av detta har det gjorts betydligt mindre forskning gällande marknadsföring på sociala medier för B2B än vad som har gjorts för B2C. Denna studie utforskar varför marknadsföring på sociala medier är mindre vanligt i B2B än B2C. Detta har gjorts genom att genomföra 11 intervjuer, öga-mot-öga, med personer som arbetar på olika B2B-företag och som har inflytande över sitt respektive företags marknadsföringsprocess. För att analysera och utvärdera resultaten från denna studie användes Technology Acceptance Model (TAM), en modell som mäter acceptansen av olika tekniska plattformar. Genom att identifiera de externa variabler som hindrar B2B-företag från att använda sociala medier analyserades användbarheten och användarvänligheten, som den uppfattas av dem intervjuade, för att undersöka vad som påverkar skillnaden i sociala media acceptans i marknadsföringssyfte mellan B2C- och B2B-företag. Resultaten av denna studie visar att den upplevda användarvänligheten är den dominerande faktorn som hindrar B2B-företag från att använda sociala medier för marknadsföringssyften. Detta är dock inte orsaken till skillnaden mellan B2B och B2C. Skillnaden kan istället förklaras av en negativare uppfattning av användbarheten av marknadsföring på sociala medier. Denna negativa uppfattning är ett resultat av egenskaperna hos sociala medier, den bransch som företaget är verksam inom, samt företagets produkter och kunder.
Talukdar, Muhammad Bakhtear U. "CFO Turnover, Firm’s Debt-Equity Choice and Information Environment." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2618.
Повний текст джерелаMyrestam, Isak. "Does infrastructure pave the way for higher property demand? : A difference-in-differences analysis of the effect of the Bothnia Line on real estate prices in Västerbotten." Thesis, Uppsala universitet, Nationalekonomiska institutionen, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-415115.
Повний текст джерелаYu, Haishan. "Essays on Environmental and Energy Economics." Doctoral thesis, Uppsala universitet, Nationalekonomiska institutionen, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-222837.
Повний текст джерелаMcKay, Ian Ross. "Assessing orientations to cultural difference of the faculty of a university foundation programme in the Gulf Cooperation Council : a mixed-methods approach informed by the Intercultural Development Continuum and using the Intercultural Development Inventory." Thesis, University of Exeter, 2013. http://hdl.handle.net/10871/13781.
Повний текст джерелаYi, Hye Yon. "Turing instabilities in a S-I-R model /." Online version of thesis, 2008. http://hdl.handle.net/1850/5901.
Повний текст джерелаWoods, Berietta F. "Numerical instabilities in finite-difference models of ordinary differential equations." DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 1989. http://digitalcommons.auctr.edu/dissertations/389.
Повний текст джерелаKluge, Tino. "Pricing derivatives in stochastic volatility models using the finite difference method." Master's thesis, Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-195504.
Повний текст джерелаDas stochastische Volatilitaetsmodell von Heston ist eines der Erweiterungen des Black-Scholes-Modells. Von der stochastischen Differentialgleichung fuer den unterliegenden Prozess kann eine partielle Differentialgleichung fuer die Wertfunktion einer Option abgeleitet werden. Es wird die Loesung mittels Finiter Differenzenmethode untersucht (Konsistenz, Stabilitaet). Weiterhin wird eine Randbedingung und ein spezielles nicht-uniformes Netz vorgeschlagen, was zu einer starken Reduzierung des numerischen Fehlers der Wertfunktion in einem ganz bestimmten Punkt fuehrt
Kluge, Tino. "Pricing derivatives in stochastic volatility models using the finite difference method." Master's thesis, Universitätsbibliothek Chemnitz, 2003. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200300086.
Повний текст джерелаDas stochastische Volatilitaetsmodell von Heston ist eines der Erweiterungen des Black-Scholes-Modells. Von der stochastischen Differentialgleichung fuer den unterliegenden Prozess kann eine partielle Differentialgleichung fuer die Wertfunktion einer Option abgeleitet werden. Es wird die Loesung mittels Finiter Differenzenmethode untersucht (Konsistenz, Stabilitaet). Weiterhin wird eine Randbedingung und ein spezielles nicht-uniformes Netz vorgeschlagen, was zu einer starken Reduzierung des numerischen Fehlers der Wertfunktion in einem ganz bestimmten Punkt fuehrt
Kluge, Tino. "Pricing derivatives in stochastic volatility models using the finite difference method." [S.l. : s.n.], 2002. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB10447116.
Повний текст джерелаKluge, Tino. "Illustration of stochastic processes and the finite difference method in finance." Universitätsbibliothek Chemnitz, 2003. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200300079.
Повний текст джерелаDer Vortrag zeigt Animationen von Realisierungen stochstischer Prozesse, die zur Modellierung von Groessen im Finanzbereich haeufig verwendet werden (z.B. Wechselkurse, Zinskurse, Aktienkurse). Im zweiten Teil wird die Loesung der Black-Scholes Partiellen Differentialgleichung mittels Finitem Differenzenverfahren graphisch veranschaulicht
Ghanam, Boushra. "Toward an integrated process model of consumer grudgeholding : does gender make any difference?" Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/14502.
Повний текст джерелаMeletiadis, Ananias. "The deterrence effect of the implementation of the Department of Defense's drug prevention policy among military personnel." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FMeletiadis.pdf.
Повний текст джерелаAbbe, Marisa Kristine. "An Analysis of Cultural Competence, Cultural Difference, and Communication Strategies in Medical Care." Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1283441352.
Повний текст джерелаCofield, Jormell Bland. "Difference in ninth-grade student performance between small learning communities and traditional high school models." DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 2012. http://digitalcommons.auctr.edu/dissertations/434.
Повний текст джерелаAmenta, Pablo Marco. "On finite difference solutions for the ocean wave spectrum in regions of non-uniform water depth." Thesis, Virginia Tech, 1989. http://hdl.handle.net/10919/44698.
Повний текст джерелаThis investigation is concerned with the determination of the sea state in terms of wave spectra. The phenomenum was calculated for two different bathymetries.
The purpose is to develop a finite difference method with an upwind differencing scheme to g solve several formulations of the wave action conservation equation. The computations were done in the wave number space and the frequency direction space. For the case of a beach with constant slope the results were compared with the analytical solution. For the case of an elliptical submerged shoal, they were compared with experimental data.
The results of the computer code showed a fairly good qualitative agreement with the actual
values for a smooth distribution of input energy.
Master of Science
Jung, Kyung Tae. "On three-dimensional hydrodynamic numerical modelling of wind induced flows in stably stratified waters : a Galerkin-finite difference approach." Title page, contents and summary only, 1989. http://web4.library.adelaide.edu.au/theses/09PH/09phj95.pdf.
Повний текст джерелаOttosson, Martin. "Jobbskatteavdraget och dess effekter på sysselsättningen - En difference-in-differences analys av reformens tre första år." Thesis, Uppsala universitet, Nationalekonomiska institutionen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-144623.
Повний текст джерелаFarquhar, Megan Elizabeth. "Cardiac modelling with fractional calculus: An efficient computational framework for modelling the propagation of electrical impulses in the heart." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/120682/1/__qut.edu.au_Documents_StaffHome_StaffGroupH%24_halla_Desktop_Megan_Farquhar_Thesis.pdf.
Повний текст джерелаHaque, Amil. "Modeling of the excited modes in inverted embedded microstrip lines using the finite-difference time-domain (FDTD) technique." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26582.
Повний текст джерелаCommittee Chair: Tentzeris, Emmanouil; Committee Member: Andrew Peterson; Committee Member: Laskar, Joy; Committee Member: Papapolymerou, Ioannis. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Al-Showaikh, Faisal Nasser Mohammed. "Numerical modelling of some systems in the biomedical sciences." Thesis, Brunel University, 1998. http://bura.brunel.ac.uk/handle/2438/6628.
Повний текст джерелаNixon, John Bruce. "Dispersion modelling using finite-difference methods with application to larval western king prawn (Pencieus latisulcatus) in Spencer Gulf, South Australia /." Title page, contents and abstract only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phn736.pdf.
Повний текст джерелаHeuer, Christof. "High-order compact finite difference schemes for parabolic partial differential equations with mixed derivative terms and applications in computational finance." Thesis, University of Sussex, 2014. http://sro.sussex.ac.uk/id/eprint/49800/.
Повний текст джерелаAndersson, Per-Åke. "Computation of Thermal Development in Injection Mould Filling, based on the Distance Model." Licentiate thesis, Linköping University, Linköping University, Optimization, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-5733.
Повний текст джерелаThe heat transfer in the filling phase of injection moulding is studied, based on Gunnar Aronsson’s distance model for flow expansion ([Aronsson], 1996).
The choice of a thermoplastic materials model is motivated by general physical properties, admitting temperature and pressure dependence. Two-phase, per-phase-incompressible, power-law fluids are considered. The shear rate expression takes into account pseudo-radial flow from a point inlet.
Instead of using a finite element (FEM) solver for the momentum equations a general analytical viscosity expression is used, adjusted to current axial temperature profiles and yielding expressions for axial velocity profile, pressure distribution, frozen layer expansion and special front convection.
The nonlinear energy partial differential equation is transformed into its conservative form, expressed by the internal energy, and is solved differently in the regions of streaming and stagnant flow, respectively. A finite difference (FD) scheme is chosen using control volume discretization to keep truncation errors small in the presence of non-uniform axial node spacing. Time and pseudo-radial marching is used. A local system of nonlinear FD equations is solved. In an outer iterative procedure the position of the boundary between the “solid” and “liquid” fluid cavity parts is determined. The uniqueness of the solution is claimed. In an inner iterative procedure the axial node temperatures are found. For all physically realistic material properties the convergence is proved. In particular the assumptions needed for the Newton-Mysovskii theorem are secured. The metal mould PDE is locally solved by a series expansion. For particular material properties the same technique can be applied to the “solid” fluid.
In the circular plate application, comparisons with the commercial FEM-FD program Moldflow (Mfl) are made, on two Mfl-database materials, for which model parameters are estimated/adjusted. The resulting time evolutions of pressures and temperatures are analysed, as well as the radial and axial profiles of temperature and frozen layer. The greatest differences occur at the flow front, where Mfl neglects axial heat convection. The effects of using more and more complex material models are also investigated. Our method performance is reported.
In the polygonal star-shaped plate application a geometric cavity model is developed. Comparison runs with the commercial FEM-FD program Cadmould (Cmd) are performed, on two Cmd-database materials, in an equilateral triangular mould cavity, and materials model parameters are estimated/adjusted. The resulting average temperatures at the end of filling are compared, on rays of different angular deviation from the closest corner ray and on different concentric circles, using angular and axial (cavity-halves) symmetry. The greatest differences occur in narrow flow sectors, fatal for our 2D model for a material with non-realistic viscosity model. We present some colour plots, e.g. for the residence time.
The classical square-root increase by time of the frozen layer is used for extrapolation. It may also be part of the front model in the initial collision with the cold metal mould. An extension of the model is found which describes the radial profile of the frozen layer in the circular plate application accurately also close to the inlet.
The well-posedness of the corresponding linearized problem is studied, as well as the stability of the linearized FD-scheme.
Report code: LiU-TEK-LIC-2002:66.
Karadogan, Erol. "Numerical Modeling Of Re-suspension And Transport Of Fine Sediments In Coastal Waters." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12605676/index.pdf.
Повний текст джерелаCrooks, Matthew Stuart. "Application of an elasto-plastic continuum model to problems in geophysics." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/application-of-an-elastoplastic-continuum-model-to-problems-in-geophysics(56bc2269-3eb2-47f9-8482-b62e8e053b76).html.
Повний текст джерелаNavera, Umme Kulsum. "Development of a model for predicting wave-current interactions and sediment transport processes in nearshore coastal waters." Thesis, Cardiff University, 2004. http://orca.cf.ac.uk/55916/.
Повний текст джерелаXu, Yang. "Performance Analysis of Point Source Model with Coincident Phase Centers in FDTD." Digital WPI, 2014. https://digitalcommons.wpi.edu/etd-theses/214.
Повний текст джерелаFantinel, Vinícius Dias. "Impactos da criação da ANCINE e das leis de incentivo à cultura sobre o cinema brasileiro." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/87468.
Повний текст джерелаThis paper evaluates the impact of the creation of the regulatory agency of the Brazilian cinema (Ancine) on Brazilian cinema. The econometric methodology used is the difference-in-differences, in which the control group is composed of foreign films and the treatment group by Brazilian films, all displayed in Brazilian cinemas. We will evaluate the impacts on income and moviegoers. Some controls are added to the regressions in order to discover and isolate the effect of other variables that may be causing changes in the variables explained, such as the average ticket price and the amount raised by the film producers obtained through national laws to encourage culture. The results indicate that there is no evidence that the creation of Ancine has created a positive differential nor the moviegoers as well as the income of Brazilian films towards foreigners. The spreads between moviegoers and income are due to the amount raised by the films through national laws to encourage culture and the price difference between the films produced in Brazil and abroad.
Hagen, Clinton Ernest. "Comparing the performance of four calculation methods for estimating the sample size in repeated measures clinical trials where difference in treatment groups means is of interest." Oklahoma City : [s.n.], 2008.
Знайти повний текст джерелаSchwarz, Rebecca M. "Cell Phone Communication Versus Face-to-Face Communication: The Effect of Mode of Communication on Relationship Satisfaction and the Difference in Quality of Communication." [Kent, Ohio] : Kent State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=kent1227282130.
Повний текст джерелаTitle from PDF t.p. (viewed Jan. 5, 2010). Advisor: Richard Serpe. Keywords: cell phone, cellular phone, relationship satisfaction, mode of communication, quality of communication, communication technology. Includes bibliographical references (p. 113-115).
Sousa, André Pacheco. "Payroll taxes and their effects on wages and employment stability." Master's thesis, Instituto Superior de Economia e Gestão, 2015. http://hdl.handle.net/10400.5/11193.
Повний текст джерелаEsta dissertação explora a importância da taxa social única (TSU) e analisa a seguinte questão: Qual é o efeito nos salários e na estabilidade do emprego de uma redução da taxa social única? Desde 2009 que o Governo Português tem vindo a implementar cortes na TSU para alguns grupos específicos, no mercado de trabalho, com o objetivo de fomentar o emprego e os salários. Foram utilizados dados anuais entre 2009 e 2013 dos Quadros de Pessoal e dos registos da Segurança Social, este último com uma frequência mensal. Utilizando a metodologia das diferenças-nas-diferenças (DID), foram analisadas as recentes mudanças no mercado de trabalho Português e estimados efeitos positivos e significativos em termos de emprego. Contudo, existem pequenos impactos negativos nos salários, especialmente em trabalhadores com menos de 45 anos, mas também efeitos negativos na estabilidade do emprego com o uso deste tido de medidas.
This dissertation explores the importance of the payroll tax (TSU) and tries to analyze que following question: What is the effect on wages and employment stability of a reduction in the payroll tax? Since 2009, Portuguese Government have been implementing cuts in the payroll tax for some specific groups, in the labor market, with the aim of boosting employment and wages. I used annual data between 2009 and 2013 from Quadros de Pessoal and Social Security records, the latter on a monthly basis. Using the difference-in-differences (DID) methodology, I analyzed these recent changes in the Portuguese labor market and I estimate positive and significant effects on employment. However, I found not only small negative impact on wages, especially in workers with less than 45 years old, but also negative effects on employment stability with the use of these kinds of measures.
Volpert, Thibault. "Étude d'un schéma différences finies haute précision et d'un modèle de fil mince oblique pour simuler les perturbations électromagnétiques sur véhicule aérospatial." Thesis, Toulouse, ISAE, 2014. http://www.theses.fr/2014ESAE0042/document.
Повний текст джерелаThis thesis is about the study of a high spatial finite element method whichcan be assimilated at an extension of the Yee schema. In the next, this method is also called high order finite difference method. In the first chapter, we give a non exhaustive recall of the major methods used to treat EMC problems and we show the necessity to have this kind of schema to simulate efficiently some EMC configurations. In the second chapter, the principle of the numerical method is presented and a stability condition is given. A numerical study analysis of the schema convergence is also done. Next, we show the interest to have the possibility to use local spatial order by cell in each direction of the computational domain. Some canonic examples are given to show the advantages interms of CPU time and memory storage of the method by comparison with Yee’s scheme and DG approach. In the third chapter, we define and validate on several examples,some physical models as thin wire, materials and perfectly metallic ground in presence of a plane wave, to have the possibility to treat EMC problems. The fourth chapter is about a hybridization strategy between our high order FDTD method and a DG schema.We focalize our study on a hybrid method which provides an energy conservation of the continuous problem. A numerical example is given to validate the method. Finally, in the last chapter, we present some simulations on industrial problems to show the possibility of the method to treat realistic EMC problems
Thurnham, A. J. "Computational modelling of the neural systems involved in schizophrenia." Thesis, University of Hertfordshire, 2008. http://hdl.handle.net/2299/1842.
Повний текст джерелаLi, Yuh-Yuh. "Social Structure, Social Control, and Crimein in Rural Communities: A Test of Social Disorganization Theory." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1237993548.
Повний текст джерелаKuo, I.-Tsen, and 郭奕岑. "The effects of New Labor Pension System on Household Saving : Evidence by Difference in Difference Model." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/2x2tme.
Повний текст джерела淡江大學
經濟學系碩士班
102
This paper investigates the effects that the implementation of the new system of labor pension on household savings in Taiwan. Due to Taiwan''s aging society, it is the most important issue to improve the economic security of the olds. The "New Labor Pension Mechanism" was implemented in 2005 by Council of Labor Affairs. Relative to the previous system, the new system is characterized by the continuation of working seniority and may increase workers’ expectations of their future wealth. Previous literature has explored the implementation of National Health Insurance Policy on savings, and they found NHI has significant negative effects on savings. This study further suggests that the effects of labor pension reform could greater than the NHI’s effect. We use Difference-in-Difference model to estimate a 12-year sample of "Panel Study of Family Dynamics" in Taiwan. Estimation results show that New Labor Pension Mechanism’s implementation significantly reduces household savings and the effects are higher for lower education level workers. Explaining by Income elasticity of savings, pension’s wealth effect on those with higher socioeconomic status is relatively small, otherwise, larger. This study supplements the limitation of researches for New Labor Pension Mechanism and could be a reference for Taiwan''s old age security policy.
HSU, JUI-SHENG, and 許瑞盛. "The Impact of Kaohsiung's Explosive Event on Neighboring Housing Price:Analysis of Difference-in-difference and Quantile Regression Model." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/w96ege.
Повний текст джерела國立屏東大學
不動產經營學系碩士班
106
In the middle of the night of July 31, 2014, Kaohsiung City's Cianjhen District and Lingya District failed to deal with the leakage of flammable gas in underground petrochemical pipelines in a timely manner, causing heavy disasters. The public's awareness of the risk of underground pipelines has increased instantaneously, and because of the considerable gap between the purchasers' filtering and analysis of the reconstruction information in the disaster areas, there are two positive and negative views on the housing price in the gas explosion area: one is to announce the existing industrial pipeline inquiry system. Impact on the housing market, causing the pipeline to fall through the road section and causing the volume to shrink; the other is to consider the positive management through the reconstruction of the disaster area and the appropriate management after the pipeline information is transparent, and believe that both underground pipelines and gas explosions have limited impact on housing prices. In order to investigate the impact of gas explosion events on residential prices in gas explosion areas, this paper uses the difference method and component regression model in the difference. According to the traffic control scope of the gas explosion disaster announced by the Kaohsiung Municipal Government, it is set as the experimental group and the control group respectively. conduct empirical research. The OLS estimates show that the residential price in the gas explosion area decreased by 0.2% after the gas explosion, but it did not reach a significant level, indicating that the price in the gas explosion area was not significantly affected by the gas explosion incident. The results of component regression showed that in the gas explosion area after gas explosion, the price of 0.1-component house decreased by 6.4%, which did not reach a significant level; the house price of 0.25 component decreased by 5.7%, reaching a significant level; the house price of 0.5 component decreased by 4.3%. Significant level; residential price increased by 0.2% at 0.75, which did not reach significant level; residential price decreased by 4.7% at 0.9%, which did not reach a significant level. It shows that the gas explosion incident caused the price drop in the middle and low price and the middle price in the gas explosion zone.
Bo-HaoHuang and 黃柏豪. "Finite-difference-time-domain model of four-level gain medium using VORPAL partical-in-cell finite-difference-time-domain program." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/78044382538330303870.
Повний текст джерела國立成功大學
光電科學與工程學系
102
The applications of laser gain medium have been extendedly investigated. Vorpal PIC-FDTD program has a function to implement the iterative solving of differential equations by user writing the solving procedure. Therefore, we can use Vorpal to model the four-level laser gain medium. Furthermore, the interaction between the surface plasmon fields and the gain medium can be examined under this function of VORPAL. In this thesis, we first examined the iterative equations of a four-level gain medium within the FDTD simulations architecture. Then they are implemented in Vorpal program. Finally, the properties of output power vs. input power for a slab of four-level gain medium are examined and analyzed. In the future, we hope to combine surface plasmon effect and four-level gain medium in VORPAL to model a plasmonic laser.