Equilibrium Selection in Signaling Games
研究信号博弈的序贯均衡，提出“神圣均衡”概念，通过限制非均衡路径上的信念来剔除不合理的均衡，并证明神圣均衡存在且与稳定均衡的关系。
This paper studies the sequential equilibria of signaling games. It introduces a new solution concept, divine equilibrium, that refines the set of sequential equilibria by requiring that off-the-equilibrium-path beliefs satisfy an additional restriction. This restriction rules out implausible sequential equilibria in many examples. We show that divine equilibria exist by demonstrating that a sequential equilibrium that fails to be divine cannot be in a stable component. However, the stable component of signaling games is typically smaller than the set of divine equilibria. We demonstrate this fact through examples. We also present a characterization of the stable equilibria in generic signaling games.