Communication and Community Enforcement
研究了随机匹配的重复囚徒困境中，沟通对社区执行合作的关键作用，发现无沟通时合作无法维持，而引入廉价谈话可恢复合作。
We study the repeated prisoner’s dilemma with random matching, a canonical model of community enforcement with decentralized information. We assume that (1) with small probability, each player is a “bad type” who never cooperates, (2) players observe and remember their partners’ identities, and (3) each player interacts with others frequently but meets any particular partner infrequently. We show that these assumptions preclude cooperation in the absence of explicit communication but that introducing within-match cheap talk communication restores cooperation. Thus, communication is essential for community enforcement.