Interim Bayesian Nash equilibrium on universal type spaces for supermodular games |
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Authors: | Timothy Van Zandt |
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Institution: | Economics and Political Science, INSEAD, Boulevard de Constance, 77305 Fontainebleau Cedex, France |
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Abstract: | We prove the existence of a greatest and a least interim Bayesian Nash equilibrium for supermodular games of incomplete information. There are two main differences from the earlier proofs and from general existence results for non-supermodular Bayesian games: (a) we use the interim formulation of a Bayesian game, in which each player's beliefs are part of his or her type rather than being derived from a prior; (b) we use the interim formulation of a Bayesian Nash equilibrium, in which each player and every type (rather than almost every type) chooses a best response to the strategy profile of the other players. There are no restrictions on type spaces and action sets may be any compact metric lattices. |
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Keywords: | C72 C61 |
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