战略性信息传递

Strategic Information Transmission

Econometrica · 1982
被引 4347 · 同刊同年前 6%
人大 A+FT50ABS 4*

中文导读

构建了一个战略沟通模型,分析信息优势方如何通过有噪声的信号传递信息,并刻画了均衡信号传递的简单形式,发现偏好越相似时信号越有效。

Abstract

This paper develops a model of strategic communication, in which a better-informed Sender (S) sends a possibly noisy signal to a Receiver (R), who then takes an action that determines the welfare of both. We characterize the set of Bayesian Nash equilibria under standard assumptions, and show that equilibrium signaling always takes a strikingly simple form, in which S partitions the support of the (scalar) variable that represents his private information and introduces noise into his signal by reporting, in effect, only which element of the partition his observation actually lies in. We show under further assumptions that before S observes his private information, the equilibrium whose partition has the greatest number of elements is Pareto-superior to all other equilibria, and that if agents coordinate on this equilibrium, R's equilibrium expected utility rises when agents' preferences become more similar. Since R bases his choice of action on rational expectations, this establishes a sense in which equilibrium signaling is more informative when agents' preferences are more similar.

战略信息传递信号博弈贝叶斯纳什均衡信息传递效率