Economic efficiency and mixed public/private insurance
In this paper we discuss the efficiency properties of insurance markets where supplementary private insurance is allowed to exist together with a compulsory government insurance plan. Our main conclusion, which is contrary to both those of Besley (1989) and Selden (1993), is that in a simple model focussing on the moral hazard problem alone, a mixed system will generally be strictly less efficient than a purely private (competitive) system. We also show that there is a flaw in Selden's (1993) main proposition, which at least in part invalidates his result on the welfare properties of systems of mixed government/private insurance.
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- Besley, Timothy, 1989. "Publicly provided disaster insurance for health and the control of moral hazard," Journal of Public Economics, Elsevier, vol. 39(2), pages 141-156, July.
- Zeckhauser, Richard, 1970. "Medical insurance: A case study of the tradeoff between risk spreading and appropriate incentives," Journal of Economic Theory, Elsevier, vol. 2(1), pages 10-26, March.
- Blomqvist, Ake, 1997. "Optimal non-linear health insurance," Journal of Health Economics, Elsevier, vol. 16(3), pages 303-321, June.
- Selden, Thomas M., 1993. "Should the government provide catastrophic insurance?," Journal of Public Economics, Elsevier, vol. 51(2), pages 241-247, June.
- Mark V. Pauly, 1974. "Overinsurance and Public Provision of Insurance: The Roles of Moral Hazard and Adverse Selection," The Quarterly Journal of Economics, Oxford University Press, vol. 88(1), pages 44-62.
- 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.
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