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Equilibrium and Strategic Communication in the Adverse Selection Insurance Model

  • Jaynes, Gerald D.

    (Yale University)

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    Shows equilibrium always exists (Rothschild-Stiglitz-Wilson model) when firms enforce policy exclusivity via strategic (profit-maximizing) communication of client purchases. Strategic communication induces two equilibrium types: partial communication of purchase information or non-communication which exhibits a lemon effect (low-risk purchase no insurance). Nonetheless, Jaynes' configuration (Jaynes; Beaudry & Poitevin) allocating both risk-types a low-coverage pooling contract and high-risk supplementary expensive coverage always characterizes equilibrium including Perfect Bayesian Equilibrium in Hellwig's two-stage framework where inter-firm informational asymmetries impose additional "competitive" features. Adverse selection induces salient features of financial markets: Bertrand-Edgeworth competition, latent contracts, strategic exclusivity-policy cancellation tactics, market institutions for sharing information.

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    Paper provided by Yale University, Department of Economics in its series Working Papers with number 91.

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    Date of creation: May 2011
    Date of revision:
    Handle: RePEc:ecl:yaleco:91
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    1. Attar, Andrea & Chassagnon, Arnold, 2009. "On moral hazard and nonexclusive contracts," Journal of Mathematical Economics, Elsevier, vol. 45(9-10), pages 511-525, September.
    2. Alberto Bisin & Danilo Guaitoli, 1998. "Moral hazard and non-exclusive contracts," Economics Working Papers 345, Department of Economics and Business, Universitat Pompeu Fabra.
    3. Laurence Ales & Pricila Maziero, 2009. "Adverse Selection and Non-Exclusive Contracts," GSIA Working Papers 2010-E61, Carnegie Mellon University, Tepper School of Business.
    4. Hellwig, Martin F., 1988. "A note on the specification of interfirm communication in insurance markets with adverse selection," Journal of Economic Theory, Elsevier, vol. 46(1), pages 154-163, October.
    5. Beaudry, P. & Poitevin, M., 1990. "Competitive Screening in Financial Market When Borrowers Can Recontract," Cahiers de recherche 9035, Universite de Montreal, Departement de sciences economiques.
    6. Beaudry, Paul & Poitevin, Michel, 1993. "Signalling and Renegotiation in Contractual Relationships," Econometrica, Econometric Society, vol. 61(4), pages 745-82, July.
    7. Andrea Attar & Arnold Chassagnon, 2009. "On moral hazard and nonexclusive contracts," Post-Print halshs-00754338, HAL.
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