文章基本信息

标题：An addendum to: a meta-analysis of hypothethical bias in stated preference valuation
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作者：Gianluca Stefani ; Riccardo Scarpa ; Ginevra V. Lombardi 等
期刊名称：Bio-based and Applied Economics
印刷版ISSN：2280-6172
出版年度：2014
卷号：3
期号：2
页码：175-184
DOI：10.13128/BAE-14704
语种：English
出版社：Bio-based and Applied Economics
摘要：A recent study published by Murphy et al. (2005) reported results of a meta-analysis of hypothetical bias using 28 valuation studies. The authors found a median ratio of hypothetical to actual values of 1.35 but they did not investigate the ratio of variances of the hypothetical and actual value distributions, which is of great relevance in joint stated and revealed preference analysis. We propose an addendum to Murphy et al. (2005) to provide some insights on the distribution of the scale factor across 23 studies for which relevant data is available. We distinguish three types of dispersion parameters reported in the literature. We find that the ratio of real to hypothetical standard deviations of marginal distributions of WTP is about 0.6.
关键词：contingent valuation;experiments;scale identification;meta-analysis;stated preferences