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Renegotiation-proof Mechanism Design

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We study a mechanism design problem under the assumption that renegotiation cannot be prevented. We investigate what kind of equilibria of which mechanisms are renegotiation-proof under a variety of renegotiation procedures, and which social choice functions can be implemented in a way that is renegotiation-proof. In complete information environments, we show that the set of ex post renegotiation-proof implementable social choice functions contains all ex post efficient allocations when there at least three agents, but only budget balanced Groves allocations when there are two agents. In incomplete information environments with correlated beliefs and at least three agents, every ex post efficient social choice function can be implemented in the presence of ex post renegotiation, but with independent private values only social choice functions that are given by budget balanced “Groves in expectations” mechanisms are implementable in such a way. We further show that the requirement of interim renegotiation-proofness does not impose additional restrictions on implementable social choice functions under complete information, but is likely to impose additional restrictions under incomplete information.

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Paper provided by University of Western Ontario, Department of Economics in its series UWO Department of Economics Working Papers with number 20101.

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Date of creation: 2010
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Handle: RePEc:uwo:uwowop:20101

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Postal: Department of Economics, Reference Centre, Social Science Centre, University of Western Ontario, London, Ontario, Canada N6A 5C2
Phone: 519-661-2111 Ext.85244
Web page: http://economics.uwo.ca/econref/WorkingPapers/departmentresearchreports.asp

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Keywords: Mechanism design; Implementation; Ex post renegotiation; Interim renegotiation;

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  1. Paul Beaudry & Michel Poitevin, 1995. "Contract Renegotiation: A Simple Framework and Implications for Organization Theory," Canadian Journal of Economics, Canadian Economics Association, vol. 28(2), pages 302-35, May.
  2. Jeffrey C. Ely & Kim-Sau Chung, 2004. "Foundations of Dominant Strategy Mechanisms," Econometric Society 2004 North American Summer Meetings 169, Econometric Society.
  3. Dirk Bergemann & Stephen Morris, 2003. "Robust Mechanism Design," Levine's Bibliography 666156000000000035, UCLA Department of Economics.
  4. Alon Klement & Zvika Neeman, 2005. "Against Compromise: A Mechanism Design Approach," Journal of Law, Economics and Organization, Oxford University Press, vol. 21(2), pages 285-314, October.
  5. Evans, R., 2006. "Mechanism Design with Renegotiation and Costly Messages," Cambridge Working Papers in Economics 0626, Faculty of Economics, University of Cambridge.
  6. Pablo Amorós, 2003. "Nash Implementation and Uncertain Renegotiation," Economic Working Papers at Centro de Estudios Andaluces E2003/27, Centro de Estudios Andaluces.
  7. Thomas P. Lyon, 2004. "Buyer-Option Contracts Restored: Renegotiation, Inefficient Threats, and the Hold-Up Problem," Journal of Law, Economics and Organization, Oxford University Press, vol. 20(1), pages 148-169, April.
  8. Kosenok, Grigory & Severinov, Sergei, 2008. "Individually rational, budget-balanced mechanisms and allocation of surplus," Journal of Economic Theory, Elsevier, vol. 140(1), pages 126-161, May.
  9. Nöldeke, Georg & Schmidt, Klaus M., 1997. "Sequential Investments and Options to Own," CEPR Discussion Papers 1645, C.E.P.R. Discussion Papers.
  10. Forges, Francoise & Minelli, Enrico & Vohra, Rajiv, 2002. "Incentives and the core of an exchange economy: a survey," Journal of Mathematical Economics, Elsevier, vol. 38(1-2), pages 1-41, September.
  11. Dirk Bergemann & Juuso Valimaki, 2002. "Information Acquisition and Efficient Mechanism Design," Econometrica, Econometric Society, vol. 70(3), pages 1007-1033, May.
  12. Aaron S. Edlin & Stefan Reichelstein, 1997. "Holdups, Standard Breach Remedies, and Optimal Investment," NBER Working Papers 5007, National Bureau of Economic Research, Inc.
  13. Chung, Tai-Yeong, 1991. "Incomplete Contracts, Specific Investments, and Risk Sharing," Review of Economic Studies, Wiley Blackwell, vol. 58(5), pages 1031-42, October.
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