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As Time Goes By: Examination of Temporal Stability Across Stated Preference Question Formats

机译:随着时间的流逝:检验各种陈述性偏好格式的时间稳定性

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摘要

We evaluate the temporal stability of willingness-to-pay values obtained from two identical stated-preference surveys undertaken in 2004 and 2012. The surveys employ two discrete-choice elicitation formats to value reductions in two health endpoints related to tap water consumption, and are explicitly designed to make direct comparisons between formats. We find no significant differences in real willingness-to-pay between the two surveys for either format-a result that is robust to the structure of heterogeneity used to model respondent preferences. Findings lend support, at least within the context of tap water quality, to the temporal transfer of nonmarket benefits over extended time periods.
机译:我们评估了从2004年和2012年进行的两次相同的陈述偏好调查获得的支付意愿值的时间稳定性。该调查采用两种离散选择启发方式来降低与自来水消耗有关的两个健康终点的价值,并且专门设计用于在格式之间进行直接比较。对于这两种格式,我们发现两次问卷调查的实际支付意愿之间没有显着差异,这一结果对于用来模拟受访者偏好的异质性结构是稳健的。研究结果至少在自来水水质的背景下为长期市场上非市场利益的暂时转移提供了支持。

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