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Alpha cores of games with nonatomic asymmetric information

Mitsunori Noguchi

Journal of Mathematical Economics, 2018, vol. 75, issue C, 1-12

Abstract: In this paper, we ask under what reasonable conditions a game with asymmetric information on a continuum of states admits a non-empty α-core. Players examine various private information-constrained contracts f (pure strategy profiles) for ex-ante efficiency by evaluating ex-ante expected payoffs and by forming ex-ante coalitions. Once the players agree on a contract, they implement it faithfully in the interim stage. Roughly speaking, our conclusion states that if players hold fine (non-atomic) and independent information, there exists an ex-ante efficient set of contracts (an ex-ante α-core pure strategy profile) that is implementable in the interim stage. To prove that α-cores are non-empty, we need a variant of Lyapunov’s theorem for Young measures that preserves private information. We apply an iterated integral version of Lyapunov’s theorem for Young measures to derive such a variant.

Keywords: α-core; Asymmetric information; Cooperative games; Incomplete information; Nonatomic (search for similar items in EconPapers)
Date: 2018
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