Respondent uncertainty in contingent valuation of preventing beach erosion: an analysis with a polychotomous choice question.
Respondent uncertainty in contingent valuation of preventing beach erosion: an analysis with a polychotomous choice question.
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DOI：
10.1016/j.jenvman.2012.08.012
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发表时间：
2012-12
影响因子：
8.7
通讯作者：
I. Logar;J. C. van den Bergh
中科院分区：
文献类型：
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作者：
I. Logar;J. C. van den Bergh
被调查者的不确定性通常被认为是陈述偏好法的主要局限性之一，这种方法目前被广泛用于环境商品和服务的估价。本文运用条件价值评估方法，检验了被调查者的不确定性对福利估计的影响。这是在保护海滩免受侵蚀的背景下进行的。被调查者的确定性水平是使用五类多分类选择问题得出的。两种不同的不确定性校准技术进行了测试，即一个，不确定的响应作为失踪，另一个不确定的“是”的响应被重新编码为“否”的响应。我们没有发现任何证据表明，前者的技术提供了任何收益超过传统的模型假设的确定性。后一种校准技术系统地减少了福利估计。只有当最确定的“是”的回答被重新编码为“否”的回答时，这种减少才具有统计学意义。文章进一步确定了受访者的不确定性的决定因素。最后，探讨了真实的市场经验如何影响受访者的不确定性。
Respondent uncertainty is often considered as one of the main limitations of stated preference methods, which are nowadays being widely used for valuing environmental goods and services. This article examines the effect of respondent uncertainty on welfare estimates by applying the contingent valuation method. This is done in the context of beach protection against erosion. Respondent certainty levels are elicited using a five-category polychotomous choice question. Two different uncertainty calibration techniques are tested, namely one that treats uncertain responses as missing and another in which uncertain ‘yes’ responses are recoded as ‘no’ responses. We found no evidence that the former technique offers any gains over the conventional model assuming certainty. The latter calibration technique systematically reduces welfare estimates. The reduction is statistically significant only when the most certain ‘yes’ responses are recoded as ‘no’ responses. The article further identifies determinants of respondent uncertainty. Finally, it explores how real market experience affects respondent uncertainty.