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Bilateral commitment

  • Bade, Sophie
  • Haeringer, Guillaume
  • Renou, Ludovic

We consider non-cooperative environments in which two players have the power to gradually and unilaterally rule out some of their actions. Formally, we embed a strategic-form game into a multi-stage game, in which players can restrict their action spaces in all but the final stage, and select among the remaining actions in the last stage. We say that an action profile is implementable by commitment if this action profile is played in the last stage of a subgame-perfect equilibrium path. We provide a complete characterization of all implementable action profiles and a simple method to find them. It turns out that the set of implementable profiles does not depend on the length of the commitment process. We show, furthermore, that commitments can have social value in the sense that in some games there are implementable action profiles that dominate all Nash equilibria of the original game.

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Article provided by Elsevier in its journal Journal of Economic Theory.

Volume (Year): 144 (2009)
Issue (Month): 4 (July)
Pages: 1817-1831

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Handle: RePEc:eee:jetheo:v:144:y:2009:i:4:p:1817-1831
Contact details of provider: Web page: http://www.elsevier.com/locate/inca/622869

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  1. Abhinay Muthoo, . "A Bargaining Model Based on the Commitment Tactic," Economics Discussion Papers 420, University of Essex, Department of Economics.
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