Choice Shifts in Groups: A Decision-Theoretic Basis
从决策理论角度证明，群体决策中的选择偏移现象与期望效用理论的失效密切相关，并将阿莱悖论与一种常见的选择偏移模式等同起来，为个体决策理论与群体社会心理学中的两个行为规律建立了联系。
The phenomenon of choice shifts in group decision-making has received attention in the social psychology literature. Faced with a risky group decision, individuals appear to support more extreme choices relative to those they would make on their own. This paper demonstrates that from a decision-theoretic perspective, choice shifts are intimately connected to failures of expected utility theory. In the model studied here, the Allais paradox is equivalent to a well-studied configuration of choice shifts. Thus, our results marry two well-known behavioral regularities, one in individual decision theory and another in the social psychology of groups.