Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 73 for “"Unobserved Heterogeneity"”.
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Unobserved heterogeneity in economic models: testing and estimation
… consists three chapters with a central theme on unobserved heterogeneity in economic models. The first two chapters discuss tests for parameter homogeneity against general alternatives. In the first chapter, I propose a unified framework for score tests of parameter homogeneity based on Neyman's …
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Unobserved Heterogeneity in Event History Analysis: A Quantile Regression Approach
… In Chapter 1 we provide a brief survey of the unobserved heterogeneity problem in event history analysis. In Chapter 2 we analyze the estimation and inference procedures of MPH models. In chapter 3 we examine the theoretical properties of random effects duration quantiles, while in Chapter 4 we …
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Panel data models with nonadditive unobserved heterogeneity : estimation and inference
… Grossman and Murphy (1994) shows significant heterogeneity in the price effect across U.S. states.
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An Econometric Analysis of Disability and Labour Force Participation in Ireland The Impact of Unobserved Heterogeneity and Measurement Error
… on participation? • How significant are unobserved effects and state dependence? • Is there differential measurement error in self-reported disability? • What are the separate impacts of unobserved effects and measurement error in a labour force participation model? Previous research …
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Conditional, Structural and Unobserved Heterogeneity: three essays on preference heterogeneity in the design of financial incentives to increase weight loss program reach
… consists of three essays on forms of preference heterogeneity in discrete choice models. The first essay uses a model of heterogeneity conditional on observed individual-specific characteristics to tailor financial incentives to enhance weight loss program participation among target demographics. …
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Variable selection in discrete survival models
… data structure. Survival data might have unobserved heterogeneity leading to biased estimates when not taken into account. Conventional variable selection methods have stability problems. A simulation approach was used to assess and compare the performance of Least Absolute Shrinkage and …
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Testing for Hidden Information and Action in Automobile Insurance Market
… on. I find strong evidence on the existence of unobserved heterogeneity that deceives the testable implication. Once the unobserved heterogeneity is controlled, I find conclusive statistical grounds supporting the presence of moral hazard in the Colombian insurance market.
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Multivariate nonparametric estimation on censored panel data
… longitudinal analyses, standard treatments of heterogeneity components result in incorrect parameterization of the duration model. As a consequence, estimation bias is not limited to duration dependence, but extends to the structural parameters as well. They show that a nonparametric mass point …
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An Economic Analysis of Secure Messaging between Patients and Providers
… misspecifications and accounts for individual unobserved heterogeneity. Controlling for individual characteristics such as age, gender, insurance source, health status, and individual unobserved heterogeneity (fixed effects), we found that an increase by $1 in the price of office visits, …
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The Competing Risks of Prepayment and Default on the Single-Family Mortgage Market
… those estimated by the other two models.</p> <p>Unobserved heterogeneity is an important component that should be considered in the modeling process, even though it is not commonly involved in the analysis of the termination risks of the mortgages. In Chapter 3, this study uses latent classes to …
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University Research and Industry Involvement. Three Essays on the Effects and Determinants of Industry Collaboration and Commercialisation in Academia
… econometric approaches to address issues of unobserved heterogeneity and endogeneity. Collaboration with industry is measured through two funding modes: (1) funding received from industry directly and (2) funding from the research council that involves business partners. The thesis is unique …
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Does using social networks lead to better job opportunities? : a direct test
… selecting on the dependent variable or ignoring unobserved heterogeneity. In this paper, I develop a novel empirical approach studying job search by shifting the attention from search outcomes to the search process. Specifically, I investigate the effect of using social ties on the quality of …
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Persistence in Residential Choice and Neighborhood Attachment
… state dependence in neighborhood choice from unobserved heterogeneity in preferences for neighborhood characteristics. I find that the differences in the two groups’ out-migration behavior are mostly explained by their differential state dependence. I show that this state dependence is …
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Semiparametric Bayesian Count Data Models
… Poisson regression. We may detect individual unobserved heterogeneity, caused by missing covariates, and/or excess of zero observations in our data. Both distributional issues results in deviations of the response distribution from the classical Poisson assumption. We may in addition want to …
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Empirical essays in industrial organization
… specialty, and music stores, and I allow for unobserved heterogeneity in preferences for store types and disutility of travel. A consumer's traveling cost varies by income, and substitution occurs proportionately more among stores of the same type. The second essay investigates an intriguing …
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Early employees of venture-backed startups : selection and wage differentials
… startups vs. established firms. To account for unobserved heterogeneity across workers, I exploit the fact that many MIT graduates receive multiple job offers and find that wage differentials are statistically insignificant from zero when individual fixed effects are employed. This implies that …
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The role of renewable energy in reducing greenhouse gas emissions in selected South Asian countries : panel data analysis
… (FE) estimation to account for time-invariant unobserved heterogeneity across nations, ensuring more impartial and accurate results. Empirical results also depict a negative relationship between the use of renewable energy and greenhouse gas emissions, hence indicating that in the past 22 …
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