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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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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. Edward Simpson Prescott & Robert M. Townsend, 2000. "Firms as clubs in Walrasian markets with private information," Working Paper 00-08, Federal Reserve Bank of Richmond.
  2. Mikhail Golosov & Aleh Tsyvinski, 2005. "Optimal Taxation with Endogenous Insurance Markets," NBER Working Papers 11185, National Bureau of Economic Research, Inc.
  3. Bruce C. Greenwald & Joseph E. Stiglitz, 1986. "Externalities in Economies with Imperfect Information and Incomplete Markets," The Quarterly Journal of Economics, Oxford University Press, vol. 101(2), pages 229-264.
  4. 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.
  5. Alberto Bennardo & Pierre-Andre Chiappori, 2003. "Bertrand and Walras Equilibria Under Moral Hazard," Levine's Working Paper Archive 618897000000000748, David K. Levine.
  6. 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.
  7. Guido Lorenzoni, 2007. "Inefficient Credit Booms," NBER Working Papers 13639, National Bureau of Economic Research, Inc.
  8. 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.
  9. Emmanuel Farhi & Mikhail Golosov & Aleh Tsyvinski, 2007. "A Theory of Liquidity and Regulation of Financial Intermediation," NBER Working Papers 12959, National Bureau of Economic Research, Inc.
  10. Caballero, Ricardo J. & Krishnamurthy, Arvind, 2004. "Smoothing sudden stops," Journal of Economic Theory, Elsevier, vol. 119(1), pages 104-127, November.
  11. 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.
  12. Alberto Bisin & John Geanakoplos & Piero Gottardi & Enrico Minelli & Herakles Polemarchakis, 2010. "Markets and contracts," Economics Working Papers ECO2010/29, European University Institute.
    • Alberto Bisin & John Geanakoplos & Piero Gottardi & Enrico Minelli & Heracles Polemarchakis, 2009. "Markets and Contracts," Working Papers 0915, University of Brescia, Department of Economics.
  13. 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.
  14. Edward C Prescott & Robert M Townsend, 1997. "General Competitive Analysis in an Economy with Private Information," Levine's Working Paper Archive 1578, David K. Levine.
  15. Mikhail Golosov & Aleh Tsyvinski, 2007. "Optimal Taxation with Endogenous Insurance Markets," The Quarterly Journal of Economics, Oxford University Press, vol. 122(2), pages 487-534.
  16. 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.
  17. Yamazaki, Akira, 1978. "An Equilibrium Existence Theorem without Convexity Assumptions," Econometrica, Econometric Society, vol. 46(3), pages 541-55, May.
  18. Marcos B. Lisboa, 2001. "Moral hazard and general equilibrium in large economies," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 18(3), pages 555-575.
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