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Testing for adverse selection into private medical insurance

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  • Pau Olivella
  • Marcos Vera-Hernandez

    ()
    (Institute for Fiscal Studies and University College London)

Abstract

We develop a test for adverse selection and use it to examine private health insurance markets. In contrast to earlier papers that consider a purely private system or a system in which private insurance supplements a public system, we focus our attention on a system where privately funded health care is substitutive of the publicly funded one. Using a model of competition among insurers, we generate predictions about the correlation between risk and the probability of taking private insurance under both symmetric information and adverse selection. These predictions constitute the basis for our adverse selection test. The theoretical model is also useful to conclude that the setting that we focus on is especially attractive to test for adverse selection. Using the British Household Panel Survey, we find evidence that adverse selection is present in this market.

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Bibliographic Info

Paper provided by Institute for Fiscal Studies in its series IFS Working Papers with number W06/02.

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Length: 48 pp.
Date of creation: Jan 2006
Date of revision:
Handle: RePEc:ifs:ifsewp:06/02

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Related research

Keywords: Contract theory; Testing; Health Insurance;

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References

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  1. Alma Cohen & Liran Einav, 2007. "Estimating Risk Preferences from Deductible Choice," American Economic Review, American Economic Association, vol. 97(3), pages 745-788, June.
  2. Propper, Carol & Rees, Hedley & Green, Katherine, 2001. "The Demand for Private Medical Insurance in the UK: A Cohort Analysis," Economic Journal, Royal Economic Society, vol. 111(471), pages C180-200, May.
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  8. Pierre-Andre Chiappori & Bernard Salanie, 2000. "Testing for Asymmetric Information in Insurance Markets," Journal of Political Economy, University of Chicago Press, vol. 108(1), pages 56-78, February.
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  27. repec:rus:hseeco:16303 is not listed on IDEAS
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Citations

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Cited by:
  1. Machado, Matilde Pinto & Pita Barros, Pedro Luis & Sanz-de-Galdeano, Anna, 2006. "Moral Hazard and the Demand for Health Services: A Matching Estimator Approach," CEPR Discussion Papers 5488, C.E.P.R. Discussion Papers.
  2. Kiil, Astrid, 2012. "Private health insurance and the use of health care services - a review of the theoretical literature with application to voluntary private health insurance in universal health care systems," COHERE Working Paper 2012:1, COHERE - Centre of Health Economics Research, University of Southern Denmark.
  3. Karlsson, Martin & Klohn, Florian & Rickayzen, Ben, 2012. "Are the Dimensions of Private Information More Multiple than Expected? Information Asymmetries in the Market of Supplementary Private Health Insurance in England," Darmstadt Discussion Papers in Economics 57826, Darmstadt Technical University, Department of Business Administration, Economics and Law, Institute of Economics (VWL).
  4. Kiil, Astrid, 2012. "What characterises the privately insured in universal health care systems? A review of the empirical evidence," Health Policy, Elsevier, vol. 106(1), pages 60-75.

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