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Aléa moral et sélection adverse sur le marché de l’assurance

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  • M.-C. Fagart
  • B. Kambia-Chopin

Abstract

This paper considers a competitive insurance market under moral hazard and adverseselection, in which both the agent's preventive effort and self protection costs are unobservableby the insurance companies. We show that the results of the adverse selection model(Rothschild and Stiglitz (1976)) can apply to our context even if it involves moral hazard.The agents with a higher marginal cost opt for a lower self protection level, so their accidentprobability is the highest. They are proposed their moral hazard contract. Adverse selectionmakes the others agents' coverage to decrease, increasing likewise their preventive action.We compare in a second time our results under moral hazard and adverse selection to theequilibrium in a market where prevention could be observed. Under reasonable assumptions,the conclusions of Rothschild and Stiglitz (1976) seem very robust.
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Suggested Citation

  • M.-C. Fagart & B. Kambia-Chopin, 2002. "Aléa moral et sélection adverse sur le marché de l’assurance," THEMA Working Papers 2002-09, THEMA (THéorie Economique, Modélisation et Applications), Université de Cergy-Pontoise.
    • Handle: RePEc:ema:worpap:2002-09
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    References listed on IDEAS

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    1. MOSSIN, Jan, 1968. "Aspects of rational insurance purchasing," LIDAM Reprints CORE 23, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
    2. de Meza, David & Webb, David C, 2001. "Advantageous Selection in Insurance Markets," RAND Journal of Economics, The RAND Corporation, vol. 32(2), pages 249-262, Summer.
    3. Stewart, Jay, 1994. "The Welfare Implications of Moral Hazard and Adverse Selection in Competitive Insurance Markets," Economic Inquiry, Western Economic Association International, vol. 32(2), pages 193-208, April.
    4. Chassagnon, A. & Chiappori, P.A., 1994. "Insurance Under Moral Hazard and Adverse Selection: The Case of Pure Competition," Papers 28, Laval - Laboratoire Econometrie.
    5. Ehrlich, Isaac & Becker, Gary S, 1972. "Market Insurance, Self-Insurance, and Self-Protection," Journal of Political Economy, University of Chicago Press, vol. 80(4), pages 623-648, July-Aug..
    6. Richard Arnott & Joseph Stiglitz, 1991. "Equilibrium in Competitive Insurance Markets with Moral Hazard," NBER Working Papers 3588, National Bureau of Economic Research, Inc.
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    Cited by:

    1. Kambia-Chopin, Bidénam, 2003. "Coûts de l’autoprotection et équilibre d’un marché de l’assurance concurrentiel," L'Actualité Economique, Société Canadienne de Science Economique, vol. 79(3), pages 327-347, Septembre.
    2. Ciprian MatiÅŸ & Eugenia MatiÅŸ, 2013. "Asymmetric Information In Insurance Field: Some General Considerations," Annales Universitatis Apulensis Series Oeconomica, Faculty of Sciences, "1 Decembrie 1918" University, Alba Iulia, vol. 1(15), pages 1-17.

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