Data/hora: 11/06/2024 05:32:55

Provedor de dados: | 31
País: | United States
Título: | Do CVM Welfare Estimates Suffer from On-Site Sampling Bias? A Comparison of On-Site and Household Visitor Surveys
Autores: | Gonzalez-Sepulveda,   Juan Marcos; Loomis,   John B.
Data: | 2010-10-26
Ano: | 2010
Palavras-chave: | Contingent valuation method; Endogenous stratification; On-site sampling bias; Environmental Economics and Policy.
Resumo: | The problem of endogenous stratification associated with on-site sampling has been overlooked in the Contingent Valuation Method (CVM). We find that using on-site samples of visitors overstates visitor willingness to pay (WTP) estimates relative to a household sample of visitors, and substantially overstates the unconditional population values. We provide two methods of correcting WTP of on-site samples. The uncorrected on-site sample CVM yields WTP of $132 per trip, while visitor WTP obtained from a random sample of households had a value of $66 per trip. Adaptation of choice-based sampling correction estimator to the on-site CVM data yields $73 per trip, not statistically different from the visitor value from the household survey, but significantly different from the uncorrected on-site sample value.
Tipo: | Journal Article
Idioma: | Inglês
Identificador: | http://purl.umn.edu/95610
Relação: | Agricultural and Resource Economics Review&gt;Volume 39, Number 3, October 2010
Formato: | 10