Rational Groupthink
研究了长期理性代理人如何从观察私人信号和他人行动中学习，发现群体学习速度慢于直接观察私人信号的小组，并指出理性群体思维是信息聚合失败的原因。
Abstract We study how long-lived rational agents learn from repeatedly observing a private signal and each others’ actions. With normal signals, a group of any size learns more slowly than just four agents who directly observe each others’ private signals in each period. Similar results apply to general signal structures. We identify rational groupthink—in which agents ignore their private signals and choose the same action for long periods of time—as the cause of this failure of information aggregation.