Gantner Anita, Kerschbamer Rudolf
Department of Economics, University of Innsbruck, Universitaetsstrasse 15, 6020 Innsbruck, Austria.
J Risk Uncertain. 2018;56(2):141-164. doi: 10.1007/s11166-018-9275-5. Epub 2018 May 8.
This paper identifies convex distributional preferences as a possible cause for the empirical observation that agents belonging to the same group tend to behave similarly in risky environments. We first show theoretically that convex distributional preferences imply social interaction effects in risky choices in the sense that observing a peer choose a risky (safe) option increases the agent's incentive to choose the risky (safe) option as well, even when lotteries are stochastically independent and the agent can only observe the lottery chosen by the peer but not the corresponding outcome. We then confirm our theoretical predictions experimentally.
本文指出，凸性分布偏好可能是经验观察结果的一个原因，即在风险环境中，属于同一群体的个体往往表现出相似的行为。我们首先从理论上表明，凸性分布偏好意味着在风险选择中存在社会互动效应，即观察到同伴选择了风险（安全）选项，会增加个体选择风险（安全）选项的动机，即使彩票是随机独立的，且个体只能观察到同伴选择的彩票，而无法观察到相应的结果。然后，我们通过实验证实了我们的理论预测。
