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Moral Hazard, Insurance, and Some Collusion

  • Ingela Brundin
  • Ching-to Albert Ma

    ()

A risk-averse consumer purchases an insurance policy; if she suffers a loss, she may receive services from a provider to recover some of the loss. Only the consumer and the provider know if the loss has actually occurred. The provider's behavior is uncertain. With some positive probability, the provider is honest, reporting the loss information truthfully to the insurer; with the complementary probability, the provider reports the information strategically, by writing a side-contract with the consumer to maximize the joint surplus of the provider-consumer coalition. We show that there is a loss of generality in considering only collusion-proof contracts, and characterize equilibria implemented by collusion-proof and noncollusion-proof contracts. When the probability of a provider acting collusively is small, the equilibrium contract is not collusion-proof but approximately first-best. When the probability of a provider acting collusively is large, the equilibrium contract is independent of this probability and identical to the equilibrium collusion-proof contract when the provider is collusive with probability 1.

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Paper provided by Boston University - Industry Studies Programme in its series Papers with number 0089.

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Date of creation: Aug 1998
Date of revision:
Handle: RePEc:fth:bostin:0089
Contact details of provider: Postal: Boston University, Industry Studies Program; Department of Economics, 270 Bay Road, Boston, Massachusetts 02215.
Phone: 617-353-4389
Fax: 617-353-4449
Web page: http://www.bu.edu/econ/isp/
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  1. Brian Erard & Jonathan Feinstein, 1993. "Honesty and Evasion in the Tax Compliance Game," Carleton Economic Papers 93-06, Carleton University, Department of Economics, revised 1994.
  2. Kofman, F. & Lawarree, J., 1993. "On the Optimality of Allowing Collusion," Working Papers 93-02, University of Washington, Department of Economics.
  3. Matthew Rabin., 1997. "Psychology and Economics," Economics Working Papers 97-251, University of California at Berkeley.
  4. Ma, Ching-to Albert & McGuire, Thomas G, 1997. "Optimal Health Insurance and Provider Payment," American Economic Review, American Economic Association, vol. 87(4), pages 685-704, September.
  5. Tirole, J., 1993. "A Theory of Collective Reputations with Applications to the Persistence of Corruption and to Firm Quality," Working papers 93-13, Massachusetts Institute of Technology (MIT), Department of Economics.
  6. Dawes, Robyn M & Thaler, Richard H, 1988. "Anomalies: Cooperation," Journal of Economic Perspectives, American Economic Association, vol. 2(3), pages 187-97, Summer.
  7. Tirole, Jean, 1986. "Hierarchies and Bureaucracies: On the Role of Collusion in Organizations," Journal of Law, Economics and Organization, Oxford University Press, vol. 2(2), pages 181-214, Fall.
  8. Samuel Bowles, 1998. "Endogenous Preferences: The Cultural Consequences of Markets and Other Economic Institutions," Journal of Economic Literature, American Economic Association, vol. 36(1), pages 75-111, March.
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