Robin Mason () (University of Southampton) Akos Valentinyi () (University of Southampton)
Abstract
This paper shows that incomplete information and sufficient heterogeneity of players can ensure uniqueness in interaction games. In contrast to recent work on uniqueness in interaction games, we do not require strategic complementarity. There are two parts to the argument. First, if a player’s signal is sufficiently uninformative of the signals of its opponents (in the sense of the Fisher information of the signal), then the player’s best response to any strategy profile of its opponents is non-decreasing in its signal. Secondly, a contraction mapping argument shows that sufficient heterogeneity ensures that equilibrium is unique.
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Publisher Info
Paper provided by Institute of Economics, Hungarian Academy of Sciences in its series IEHAS Discussion Papers with number
0303.
Find related papers by JEL classification: C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information
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