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Linear Prices Equilibria and Nonexclusive Insurance Market

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Author Info

  • Frédéric Loss

    (Department of Economics, Ecole Polytechnique - CNRS : UMR7176 - Polytechnique - X, CNAM Paris - Conservatoire National des Arts et Métiers - Conservatoire National des Arts et Métiers (CNAM))

  • Gwanaël Piaser

    (IPAG - Business School)

Abstract

We consider a competitive insurance market in which agents can privately enter into multicontractual insurance relationships and undertake hidden actions. We study the existence of linear equilibria when insurance companies do not have any restriction on their pricing rules. We provide conditions under which a linear equilibrium exists. We show that two different types of linear equilibria could exist: A first one in which insurance companies make zero expected profits, and a second one in which they make strictly positive expected profits. We also analyze the welfare properties of the linear equilibria. We show that they are not always second best Pareto optimal.

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Bibliographic Info

Paper provided by HAL in its series Working Papers with number hal-00870113.

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Date of creation: 05 Oct 2013
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Handle: RePEc:hal:wpaper:hal-00870113

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Related research

Keywords: Common Agency; Insurance; Moral Hazard; Perfect Competition; Linear Prices Equilibria;

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  1. David Martimort & Lars Stole, 2002. "The Revelation and Delegation Principles in Common Agency Games," Econometrica, Econometric Society, vol. 70(4), pages 1659-1673, July.
  2. Michael Peters, 1999. "Common Agency and the Revelation Principle," Working Papers peters-99-01, University of Toronto, Department of Economics.
  3. Bisin, Alberto & Guaitoli, Danilo, 1998. "Moral Hazard and Non-Exclusive Contracts," CEPR Discussion Papers 1987, C.E.P.R. Discussion Papers.
  4. Arnott, Richard J & Stiglitz, Joseph E, 1988. " The Basic Analytics of Moral Hazard," Scandinavian Journal of Economics, Wiley Blackwell, vol. 90(3), pages 383-413.
  5. Charles M. Kahn & Dilip Mookherjee, 1998. "Competition and Incentives with Nonexclusive Contracts," RAND Journal of Economics, The RAND Corporation, vol. 29(3), pages 443-465, Autumn.
  6. Pauly, Mark V, 1974. "Overinsurance and Public Provision of Insurance: The Roles of Moral Hazard and Adverse Selection," The Quarterly Journal of Economics, MIT Press, vol. 88(1), pages 44-62, February.
  7. Helpman, Elhanan & Laffont, Jean-Jacques, 1975. "On moral hazard in general equilibrium theory," Journal of Economic Theory, Elsevier, vol. 10(1), pages 8-23, February.
  8. Attar, Andrea & Chassagnon, Arnold, 2009. "On moral hazard and nonexclusive contracts," Journal of Mathematical Economics, Elsevier, vol. 45(9-10), pages 511-525, September.
  9. Rothschild, Michael & Stiglitz, Joseph E, 1976. "Equilibrium in Competitive Insurance Markets: An Essay on the Economics of Imperfect Information," The Quarterly Journal of Economics, MIT Press, vol. 90(4), pages 630-49, November.
  10. Laurence Ales & Pricila Maziero, 2009. "Adverse Selection and Non-Exclusive Contracts," GSIA Working Papers 2010-E61, Carnegie Mellon University, Tepper School of Business.
  11. Richard Arnott & Joseph Stiglitz, 1991. "Equilibrium in Competitive Insurance Markets with Moral Hazard," NBER Working Papers 3588, National Bureau of Economic Research, Inc.
  12. Laurence Ales, 2009. "Adverse Selection and Non-exclusive Contracts," 2009 Meeting Papers 854, Society for Economic Dynamics.
  13. Christine A. Parlour & Uday Rajan, 2001. "Competition in Loan Contracts," American Economic Review, American Economic Association, vol. 91(5), pages 1311-1328, December.
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