Communication in Repeated Games with Imperfect Private Monitoring
研究玩家在重复博弈中通过公开信息沟通来揭示私人信号，分析揭示约束如何影响效率，并证明三人以上时可达纳什威胁版本的民间定理，两人时仍可近似实现有效结果。
This paper examines repeated games in which each player observes a private and imperfect signal on the actions played, and in which players are allowed to communicate using public messages. Providing incentives for players to reveal their observations generates (revelation) constraints that, combined with signal imperfections, may be a source of inefficiencies. However, by delaying the revelation of their observations, players may economize on the cost of deterring deviations, and thereby avoid these inefficiencies. Because a player would not want to trigger a sanction that would penalize him too, revelation constraints also tend to make sanctions difficult to enforce. However, with at least three players, detecting deviations may not require that all the players reveal their observations. In that case, we obtain a Nash threat version of the Folk theorem. With two players, we do not obtain a similar result. Nevertheless, we show that an efficient outcome can (almost) always be approximated.