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The accuracy of proxy responses in a stated choice setting: A re-examination and some controversial conclusions

机译：陈述选择条件下代理人回答的准确性：重新检查和一些有争议的结论

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摘要

Data is typically gathered trom an individual respondent who represents the group or the household. This individual is often identified as the "primary decision maker" and is asked to provide responses as a proxy for the group given that the cost of interviewing each member individually is impractical and/or expensive. The collection of joint preferences is rarely undertaken, with the use of proxy responses not uncommon in travel behaviour research. Under such a framework, there exists an assumption that the primary decision maker has perfect knowledge of other group member preferences, and bargaining behaviour, and is able to synthesise this information when providing a response on their behalf. The validity of such an assumption however remains an open question, with recent research calling the reliability of proxy responses into account (Bateman and Munro, 2009). In this paper, using three models estimated in willingness to pay space, we examine the accuracy of proxy responses in a stated choice experiment. We find that there is overlap between a proxy response and the own preferences of the individual providing the proxy choice, but while the proxy responses fail to represent the full preference heterogeneity that exists in the actual choices made by individuals, the proxy responses in aggregate provide a suitable replacement for actual data, subject to a number of caveats.
机译：数据通常是从代表群体或家庭的个人受访者那里收集的。考虑到单独采访每个成员的成本是不切实际和/或昂贵的，因此通常将此人标识为“主要决策者”，并被要求提供答复作为该组的代理人。很少有联合偏好的收集，在旅行行为研究中并不罕见使用代理响应。在这样的框架下，存在这样一个假设，即主要决策者对其他小组成员的偏好和讨价还价行为具有完全的了解，并能够在代表他们做出回应时综合这些信息。然而，这种假设的有效性仍然是一个悬而未决的问题，最近的研究称要考虑代理响应的可靠性（Bateman和Munro，2009）。在本文中，我们使用三种在支付空间上的意愿进行估计的模型来检验指定选择实验中代理响应的准确性。我们发现代理响应与提供代理选择的个人的自身偏好之间存在重叠，但是尽管代理响应无法代表个体实际选择中存在的完全偏好异质性，但代理响应总体上提供了需要注意的是，对实际数据的适当替代。

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