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Moral hazard and private monitoring

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  • Damme, E.E.C. van
  • Bhaskar, V.

    (Tilburg University, Center for Economic Research)

Abstract

We analyze a model of repeated bilateral trade with moral hazard, where the quality of goods received can differ from the quality despatched due to deterioration during transportation. Since the sender does not observe the quality of good received and the receiver does not observe the quality despatched, we have a repeated game with with imperfect monitoring by private signals. The stage game has multiple Nash equilibria, which would allow cooperation in finitely repeated interaction. However, with private signals, the pure strategy equilibria of the twice-repeated game are degenerate, and cannot support any cooperation.We construct a mixed strategy equilibrium which supports partial cooperation. However this mixed strategy equilibrium cannot approximate the cooperative outcome even if the noise in the signals tends to zero. This failure of lower hemicontinuity in the sequential equilibrium correspondence is removed if we allow for extensive form correlation; i.e. we allow players to condition their second period actions upon a sunspot as well as the private signals. We use these ideas to show how efficient outcomes can be supported in infinitely repeated one-sided moral hazard.

(This abstract was borrowed from another version of this item.)

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Bibliographic Info

Paper provided by Tilburg University, Center for Economic Research in its series Discussion Paper with number 1997-98.

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Date of creation: 1997
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Handle: RePEc:dgr:kubcen:199798

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Web page: http://center.uvt.nl

Related research

Keywords: game theory; moral hazard; information;

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References

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  3. Carlsson, H. & Damme, E.E.C. van, 1990. "Global games and equilibrium selection," Discussion Paper 1990-52, Tilburg University, Center for Economic Research.
  4. Ellison, Glenn, 1994. "Cooperation in the Prisoner's Dilemma with Anonymous Random Matching," Review of Economic Studies, Wiley Blackwell, vol. 61(3), pages 567-88, July.
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  8. Mailath, George J. & Morris, Stephen, 2002. "Repeated Games with Almost-Public Monitoring," Journal of Economic Theory, Elsevier, vol. 102(1), pages 189-228, January.
  9. Werner GÜTH & Georg KIRCHSTEIGER & Klaus RITZBERGER, 1995. "Imperfectly Observable Commitments in n-Player Games," Vienna Economics Papers vie9507, University of Vienna, Department of Economics.
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  13. Kyle Bagwell, 1992. "Commitment and Observability in Games," Discussion Papers 1014, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  14. Bhaskar, V, 1998. "Informational Constraints and the Overlapping Generations Model: Folk and Anti-Folk Theorems," Review of Economic Studies, Wiley Blackwell, vol. 65(1), pages 135-49, January.
  15. van Damme, Eric & Hurkens, Sjaak, 1997. "Games with Imperfectly Observable Commitment," Games and Economic Behavior, Elsevier, vol. 21(1-2), pages 282-308, October.
  16. Michihiro Kandori & Hitoshi Matsushima, 1997. "Private observation and Communication and Collusion," Levine's Working Paper Archive 1256, David K. Levine.
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  18. Kandori, Michihiro, 1992. "The Use of Information in Repeated Games with Imperfect Monitoring," Review of Economic Studies, Wiley Blackwell, vol. 59(3), pages 581-93, July.
  19. Damme, E.E.C. van & Hurkens, J.P.M., 1994. "Games with imperfectly observable commitment," Discussion Paper 1994-64, Tilburg University, Center for Economic Research.
  20. Klein, Benjamin & Leffler, Keith B, 1981. "The Role of Market Forces in Assuring Contractual Performance," Journal of Political Economy, University of Chicago Press, vol. 89(4), pages 615-41, August.
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  22. Morris, Stephen & Rob, Rafael & Shin, Hyun Song, 1995. "Dominance and Belief Potential," Econometrica, Econometric Society, vol. 63(1), pages 145-57, January.
  23. Radner, Roy & Myerson, Roger & Maskin, Eric, 1986. "An Example of a Repeated Partnership Game with Discounting and with Uniformly Inefficient Equilibria," Review of Economic Studies, Wiley Blackwell, vol. 53(1), pages 59-69, January.
  24. Benoit, Jean-Pierre & Krishna, Vijay, 1985. "Finitely Repeated Games," Econometrica, Econometric Society, vol. 53(4), pages 905-22, July.
  25. Olivier Compte, 1998. "Communication in Repeated Games with Imperfect Private Monitoring," Econometrica, Econometric Society, vol. 66(3), pages 597-626, May.
  26. Harris, Christopher & Reny, Philip & Robson, Arthur, 1995. "The Existence of Subgame-Perfect Equilibrium in Continuous Games with Almost Perfect Information: A Case for Public Randomization," Econometrica, Econometric Society, vol. 63(3), pages 507-44, May.
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