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Information-Constrained Optima with Retrading: An Externality and Its Market-Based Solution

  • Kilenthong, Weerachart
  • Townsend, Robert

This paper studies the efficiency of competitive equilibria in environments with a moral hazard problem and unobserved states, both with retrading in ex post spot markets. The interaction between private information problems and the possibility of retrade creates an externality, unless preferences have special, restrictive properties. The externality is internalized by allowing agents to contract ex ante on market fundamentals determining the spot price or interest rate, over and above contracting on actions and outputs. Then competitive equilibria are equivalent with the appropriate notion of constrained Pareto optimality. Examples show that it is possible to have multiple market fundamentals or price islands, created endogenously in equilibrium.

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File URL: http://mpra.ub.uni-muenchen.de/20725/1/MPRA_paper_20725.pdf
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Paper provided by University Library of Munich, Germany in its series MPRA Paper with number 20725.

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Date of creation: 01 Feb 2010
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Handle: RePEc:pra:mprapa:20725
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  1. Mikhail Golosov, 2007. "Optimal Taxation With Endogenous Insurance Markets," The Quarterly Journal of Economics, MIT Press, vol. 122(2), pages 487-534, 05.
  2. Guido Lorenzoni, 2007. "Inefficient Credit Booms," NBER Working Papers 13639, National Bureau of Economic Research, Inc.
  3. Bennardo, Alberto & Chiappori, Pierre-André, 2002. "Bertrand and Walras Equilibria Under Moral Hazard," CEPR Discussion Papers 3650, C.E.P.R. Discussion Papers.
  4. Douglas W. Diamond & Philip H. Dybvig, 2000. "Bank runs, deposit insurance, and liquidity," Quarterly Review, Federal Reserve Bank of Minneapolis, issue Win, pages 14-23.
  5. Tsyvinski, Aleh & Golosov, Mikhail & Farhi, Emmanuel, 2009. "A Theory of Liquidity and Regulation of Financial Intermediation," Scholarly Articles 4481504, Harvard University Department of Economics.
  6. Franklin Allen & Douglas Gale, 2003. "Financial Intermediaries and Markets," Center for Financial Institutions Working Papers 00-44, Wharton School Center for Financial Institutions, University of Pennsylvania.
  7. Bisin, A. & Geanakoplos, J.D. & Gottardi, P. & Minelli, E. & Polemarchakis, H., 2011. "Markets and contracts," Journal of Mathematical Economics, Elsevier, vol. 47(3), pages 279-288.
  8. Marcos B. Lisboa, 2001. "Moral hazard and general equilibrium in large economies," Economic Theory, Springer, vol. 18(3), pages 555-575.
  9. Edward C Prescott & Robert M Townsend, 2010. "Pareto Optima and Competitive Equilibria With Adverse Selection and Moral Hazard," Levine's Working Paper Archive 2069, David K. Levine.
  10. John C. Fellingham & Young K. Kwon & D. Paul Newman, 1984. "Ex ante Randomization in Agency Models," RAND Journal of Economics, The RAND Corporation, vol. 15(2), pages 290-301, Summer.
  11. Greenwald, Bruce C & Stiglitz, Joseph E, 1986. "Externalities in Economies with Imperfect Information and Incomplete Markets," The Quarterly Journal of Economics, MIT Press, vol. 101(2), pages 229-64, May.
  12. Yamazaki, Akira, 1978. "An Equilibrium Existence Theorem without Convexity Assumptions," Econometrica, Econometric Society, vol. 46(3), pages 541-55, May.
  13. Caballero, Ricardo J. & Krishnamurthy, Arvind, 2001. "International and domestic collateral constraints in a model of emerging market crises," Journal of Monetary Economics, Elsevier, vol. 48(3), pages 513-548, December.
  14. Caballero, Ricardo J. & Krishnamurthy, Arvind, 2004. "Smoothing sudden stops," Journal of Economic Theory, Elsevier, vol. 119(1), pages 104-127, November.
  15. J C Fellingham & Y K Kwon & D P Newman, 2010. "Ex Ante Randomization in Agency Models," Levine's Working Paper Archive 1953, David K. Levine.
  16. Prescott, Edward C & Townsend, Robert M, 1984. "General Competitive Analysis in an Economy with Private Information," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 25(1), pages 1-20, February.
  17. Edward Simpson Prescott & Robert M. Townsend, 2006. "Firms as Clubs in Walrasian Markets with Private Information," Journal of Political Economy, University of Chicago Press, vol. 114(4), pages 644-671, August.
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