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Equilibrium in competitive insurance markets with ex ante adverse selection and ex post moral hazard

  • Jack, William

Existence of pure strategy equilibria is studied in insurance markets that exhibit both ex ante adverse selection of the Rothschild-Stiglitz-Wilson type, and ex post hidden information moral hazard. It is found that ex post moral hazard has two offsetting effects on the existence of equilibrium, and that in general it is difficult to say whether an equilibrium is more or less likely to exist.

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File URL: http://www.sciencedirect.com/science/article/B6V76-45R6RRB-6/2/c90f9646df9a0e4e68ffc7ce81dc362b
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Article provided by Elsevier in its journal Journal of Public Economics.

Volume (Year): 84 (2002)
Issue (Month): 2 (May)
Pages: 251-278

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Handle: RePEc:eee:pubeco:v:84:y:2002:i:2:p:251-278
Contact details of provider: Web page: http://www.elsevier.com/locate/inca/505578

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  1. Jack, William & Sheiner, Louise, 1997. "Welfare-Improving Health Expenditure Subsidies," American Economic Review, American Economic Association, vol. 87(1), pages 206-21, March.
  2. Cutler David M. & Zeckhauser Richard J., 1998. "Adverse Selection in Health Insurance," Forum for Health Economics & Policy, De Gruyter, vol. 1(1), pages 1-33, January.
  3. Dasgupta, Partha & Maskin, Eric, 1986. "The Existence of Equilibrium in Discontinuous Economic Games, I: Theory," Review of Economic Studies, Wiley Blackwell, vol. 53(1), pages 1-26, January.
  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. Pauly, Mark V, 1986. "Taxation, Health Insurance, and Market Failure in the Medical Economy," Journal of Economic Literature, American Economic Association, vol. 24(2), pages 629-75, June.
  6. Dasgupta, Partha & Maskin, Eric, 1986. "The Existence of Equilibrium in Discontinuous Economic Games, II: Applications," Review of Economic Studies, Wiley Blackwell, vol. 53(1), pages 27-41, January.
  7. Myerson, Roger B, 1979. "Incentive Compatibility and the Bargaining Problem," Econometrica, Econometric Society, vol. 47(1), pages 61-73, January.
  8. Thomas Buchmueller & John Dinardo, 2002. "Did Community Rating Induce an Adverse Selection Death Spiral? Evidence from New York, Pennsylvania, and Connecticut," American Economic Review, American Economic Association, vol. 92(1), pages 280-294, March.
  9. Feldstein, Martin & Friedman, Bernard, 1977. "Tax subsidies, the rational demand for insurance and the health care crisis," Journal of Public Economics, Elsevier, vol. 7(2), pages 155-178, April.
  10. Manning, Willard G, et al, 1987. "Health Insurance and the Demand for Medical Care: Evidence from a Randomized Experiment," American Economic Review, American Economic Association, vol. 77(3), pages 251-77, June.
  11. Mirrlees, James A, 1971. "An Exploration in the Theory of Optimum Income Taxation," Review of Economic Studies, Wiley Blackwell, vol. 38(114), pages 175-208, April.
  12. Wilson, Charles, 1977. "A model of insurance markets with incomplete information," Journal of Economic Theory, Elsevier, vol. 16(2), pages 167-207, December.
  13. Chernew, Michael E. & Frick, Kevin D., 1999. "The impact of managed care on the existence of equilibrium in health insurance markets," Journal of Health Economics, Elsevier, vol. 18(5), pages 571-590, October.
  14. 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.
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