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Individual vs. group decision-making: an experiment on dynamic choice under risk and ambiguity

机译：个人与团体决策：风险和歧义下的动态选择实验

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This paper focuses on the comparison of individual and group decision-making, in a stochastic inter-temporal problem in two decision environments, namely risk and ambiguity. Using a consumption/saving laboratory experiment, we investigate behaviour in four treatments: (1) individual choice under risk; (2) group choice under risk; (3) individual choice under ambiguity and (4) group choice under ambiguity. Comparing decisions within and between decision environments, we find an anti-symmetric pattern. While individuals are choosing on average closer to the theoretical optimal predictions, compared to groups in the risk treatments, groups tend to deviate less under ambiguity. Within decision environments, individuals deviate more when they choose under ambiguity, while groups are better planners under ambiguity rather than under risk. Our results extend the often observed pattern of individuals (groups) behaving more optimally under risk (ambiguity), to its dynamic dimension.
机译：本文重点介绍个人和团体决策的比较，在两个决定环境中随机时间问题，即风险和歧义。使用消费/储蓄实验室实验，我们调查四项治疗中的行为：（1）风险下的个别选择; （2）风险下的组选择; （3）在歧义下的个人选择和（4）歧义下的组合选择。比较决策环境中和之间的决策，我们发现了一种反对称模式。虽然个人在平均选择较近理论最优预测的情况下，与风险处理中的群体相比，群体往往偏离歧义的较少。在决策环境中，当他们在歧义下选择时，个人偏离更多，而群体是歧义的更好的规划者，而不是在风险下进行。我们的结果延长了在风险（歧义）下的常见的个体（组）模式延伸到其动态维度。

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