Econometrica: Mar, 2009, Volume 77, Issue 2
Belief‐Free Equilibria in Games With Incomplete Information
Johannes Hörner, Stefano Lovo
We define belief‐free equilibria in two‐player games with incomplete information as sequential equilibria for which players' continuation strategies are best replies after every history, independently of their beliefs about the state of nature. We characterize a set of payoffs that includes all belief‐free equilibrium payoffs. Conversely, any payoff in the interior of this set is a belief‐free equilibrium payoff. The characterization is applied to the analysis of reputations.
Supplement to "Belief-free equilibria in games with incomplete information"
File contains some omitted details on the existence of belief free equilibria for two families of games that are studied in the literature on reputation.