Overcoming hypothetical bias in contingent valuation surveys
Abstract
This Ph.D. thesis aims to build econometric models that can overcome hypothetical bias in Contingent Valuation surveys. Within 4 interrelated Chapters, this thesis focuses on constructing a mixture model and applying stochastic frontier analysis in order to include the existence of hypothetical bias. The main idea of the proposed model of the present thesis is that in a Contingent Valuation survey there might be two types of respondents. The first one refers to respondents that answer sincerely about their WTP and the second to respondents that overstate their WTP. The first chapter presents a literature review regarding Contingent Valuation Method (CVM) and the problem of Hypothetical Bias. Additionally, it analyzes the theoretical framework regarding the statistical models that are constructed in Chapter 2 and 3. The second and third Chapters present the proposed model that can overcome hypothetical bias for the open-ended elicitation format and for the double-bounded dichotomous ch ...
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