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Moral hazard and linear contracts : Economies with idiosyncratic risks

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  • CITANNA, Alessandro
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    Abstract

    In exchange economies where moral hazard affects the distribution of individual risks, we study the viability of linear nonexclusive contracts. It is shown that the linearity in prices and payoffs is compatible with the presence of moral hazard when coupled with a simple participation fee. More specifically, we prove existence of competitive equilibrium when individuals exchange the contracts. The participation fee can be seen as a form of sharing the profits and losses of an insurance company offering such contracts. The contracts can be given the more general interpretation of financial assets in markets where the unverifiability of trades is widespread. The asset prices are such that financial markets may be "incomplete" at equilibrium.

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    File URL: http://www.hec.fr/var/fre/storage/original/application/5ed3f347f9b83002c7127cab6b09c46f.pdf
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    Bibliographic Info

    Paper provided by HEC Paris in its series Les Cahiers de Recherche with number 699.

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    Length: 28 pages
    Date of creation: 01 Jan 2000
    Date of revision:
    Handle: RePEc:ebg:heccah:0699

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    Postal: HEC Paris, 78351 Jouy-en-Josas cedex, France
    Web page: http://www.hec.fr/
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    Related research

    Keywords: Moral hazard; competitive equilibrium; financial markets; insurance;

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    References

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    1. M Ali Khan & Yeneng Sun, 1997. "On the Decomposition and Characterization of Risk With a Continuum of Random Variables," Economics Working Paper Archive 383, The Johns Hopkins University,Department of Economics.
    2. Prescott, Edward C & Townsend, Robert M, 1984. "Pareto Optima and Competitive Equilibria with Adverse Selection and Moral Hazard," Econometrica, Econometric Society, vol. 52(1), pages 21-45, January.
    3. MINELLI, Enrico & POLEMARCHAKIS, Heracles, 1999. "Nash-Walras equilibria of a large economy," CORE Discussion Papers 1999043, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
    4. Grossman, Sanford J & Hart, Oliver D, 1983. "An Analysis of the Principal-Agent Problem," Econometrica, Econometric Society, vol. 51(1), pages 7-45, January.
    5. Harald Uhlig, 1996. "A law of large numbers for large economies (*)," Economic Theory, Springer, vol. 8(1), pages 41-50.
    6. Smale, S., 1974. "Global analysis and economics IIA : Extension of a theorem of Debreu," Journal of Mathematical Economics, Elsevier, vol. 1(1), pages 1-14, March.
    7. Pradeep Dubey & John Geanakoplos & Martin Shubik, 1988. "Default and Efficiency in a General Equilibrium Model with Incomplete Markets," Cowles Foundation Discussion Papers 879R, Cowles Foundation for Research in Economics, Yale University, revised Feb 1989.
    8. 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.
    9. Malinvaud, E, 1973. "Markets for an Exchange Economy with Individual Risks," Econometrica, Econometric Society, vol. 41(3), pages 383-410, May.
    10. 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.
    11. Cass, David & Chichilnisky, Graciela & Wu, Ho-Mou, 1996. "Individual Risk and Mutual Insurance," Econometrica, Econometric Society, vol. 64(2), pages 333-41, March.
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    Cited by:
    1. Calcagno, Riccardo & Wagner, Wolf, 2006. "Dispersed initial ownership and the efficiency of the stock market under moral hazard," Journal of Mathematical Economics, Elsevier, vol. 42(1), pages 36-45, February.

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