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Belief-Based Equilibria in the Repeated Prisoners' Dilemma with Private Monitoring

  • V. Bhaskar

    (University of Essex)

  • Ichiro Obara

    (University of Pennsylvania)

We analyze the infinitely repeated prisoners' dilemma with imperfect private monitoring and discounting. The main contribution of this paper is to construct ``belief-based'' strategies, where a player's continuation strategy is a function only of his beliefs. This simplifies the analysis considerably, and allows us to explicitly construct sequential equilibria for such games, thus enabling us to invoke the one-step deviation principle of dynamic programming. By doing so, we prove that one can approximate the efficient payoff in any prisoners' dilemma game provided that the monitoring is sufficiently accurate. Furthermore, for a class of prisoners' dilemma games, one can approximate every individually rational feasible payoff. These results require that monitoring be sufficiently accurate, but only require a uniform lower bound on the discount rate.

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Paper provided by Econometric Society in its series Econometric Society World Congress 2000 Contributed Papers with number 1330.

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Date of creation: 01 Aug 2000
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Handle: RePEc:ecm:wc2000:1330
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  1. George J. Mailath & Stephen Morris, 2000. "Repeated Games with Almost-Public Monitoring," Econometric Society World Congress 2000 Contributed Papers 0661, Econometric Society.
  2. Jeffrey C. Ely & Juuso Valimaki, 1999. "A Robust Folk Theorem for the Prisoner's Dilemma," Discussion Papers 1264, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  3. George J. Mailath & Stephen Morris, . ""Repeated Games with Imperfect Private Monitoring: Notes on a Coordination Perspective''," CARESS Working Papres 98-07, University of Pennsylvania Center for Analytic Research and Economics in the Social Sciences.
  4. Bhaskar, V. & van Damme, E.E.C., 2002. "Moral hazard and private monitoring," Other publications TiSEM 432fc615-feb9-4c90-8a14-e, Tilburg University, School of Economics and Management.
  5. Bhaskar, V., 1994. "Informational Constraints and the Overlapping Generations Model: Folk and Anti-Folk Theorems," Papers 9485, Tilburg - Center for Economic Research.
  6. Drew Fudenberg & David K. Levine & Eric Maskin, 1994. "The Folk Theorem with Imperfect Public Information," Levine's Working Paper Archive 2058, David K. Levine.
  7. Ichiro Obara, . "The Repeated Prisoner's Dilemma with Private Monitoring: a N-player case," CARESS Working Papres 99-13, University of Pennsylvania Center for Analytic Research and Economics in the Social Sciences.
  8. Michihiro Kandori & Hitoshi Matsushima, 1998. "Private Observation, Communication and Collusion," Econometrica, Econometric Society, vol. 66(3), pages 627-652, May.
  9. Piccione, Michele, 2002. "The Repeated Prisoner's Dilemma with Imperfect Private Monitoring," Journal of Economic Theory, Elsevier, vol. 102(1), pages 70-83, January.
  10. Olivier Compte, 1998. "Communication in Repeated Games with Imperfect Private Monitoring," Econometrica, Econometric Society, vol. 66(3), pages 597-626, May.
  11. Glen Ellison, 2010. "Cooperation in the Prisoner's Dilemma with Anonymous Random Matching," Levine's Working Paper Archive 631, David K. Levine.
  12. Matsushima, Hitoshi, 1991. "On the theory of repeated games with private information : Part I: anti-folk theorem without communication," Economics Letters, Elsevier, vol. 35(3), pages 253-256, March.
  13. Ichiro Obara, 2000. "Private Strategy and Efficiency: Repeated Partnership Games Revisited," Econometric Society World Congress 2000 Contributed Papers 1449, Econometric Society.
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