Word-of-Mouth Communication and Social Learning
研究口碑传播如何聚合个体信息，发现沟通结构决定是否所有个体最终做出相同选择，且沟通越少越可能趋同；尽管决策规则简单且环境随机，口碑传播仍可能使所有人采用平均更优的行动，且这种社会高效结果在每人只采样少数他人时更易出现。
This paper studies the way that word-of-mouth communication aggregates the information of individual agents. We find that the structure of the communication process determines whether all agents end up making identical choices, with less communication making this conformity more likely. Despite the players' naive decision rules and the stochastic decision environment, word-of-mouth communication may lead all players to adopt the action that is on average superior. These socially efficient outcomes tend to occur when each agent samples only a few others.