Does Adverse Selection Matter? Evidence from a Natural Experiment
The empirical evidence of adverse selection in insurance markets is mixed. The problem in assessing the extent of adverse selection is that private information, on which agents act, is generally unobservable to the researcher, which makes it difficult to distinguish between adverse selection and moral hazard. Unique micro data, from a dental insurance natural experiment, is here used to provide a direct test of selection. All agents in a population were stratified into different risk classes, and were unexpectedly given the opportunity to insure their dental care costs. The setup of the insurance makes it possible to observe a proxy for private information. Interestingly, results differ across risk classes. Within high-risk classes, there is evidence of adverse selection and within low-risk classes, the results, surprisingly, indicate an advantageous selection. This dual selection can explain the limited empirical evidence for adverse selection in insurance markets in the literature: the two effects may balance out on the aggregate level. The paper also presents a model of insurance choice that can harbor both adverse and advantageous selection. The pattern in the data is explained by differences in the effectiveness of prevention across high and low risk classes.
|Date of creation:||10 Nov 2004|
|Contact details of provider:|| Postal: The Economic Research Institute, Stockholm School of Economics, P.O. Box 6501, 113 83 Stockholm, Sweden|
Phone: +46-(0)8-736 90 00
Fax: +46-(0)8-31 01 57
Web page: http://www.hhs.se/
More information through EDIRC
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- John Cawley & Tomas Philipson, 1996.
"An Empirical Examination of Information Barriers to Trade in Insurance,"
NBER Working Papers
5669, National Bureau of Economic Research, Inc.
- John Cawley & Tomas Philipson, 1997. "An Empirical Examination of Information Barriers to Trade inInsurance," University of Chicago - George G. Stigler Center for Study of Economy and State 132, Chicago - Center for Study of Economy and State.
- Thomas Buchmueller & John DiNardo, 1999. "Did Community Rating Induce an Adverse Selection Death Spiral? Evidencefrom New York, Pennsylvania and Connecticut," NBER Working Papers 6872, National Bureau of Economic Research, Inc.
- Robert B. Barsky & Miles S. Kimball & F. Thomas Juster & Matthew D. Shapiro, 1995. "Preference Parameters and Behavioral Heterogeneity: An Experimental Approach in the Health and Retirement Survey," NBER Working Papers 5213, National Bureau of Economic Research, Inc.
- Michael Rothschild & Joseph Stiglitz, 1976. "Equilibrium in Competitive Insurance Markets: An Essay on the Economics of Imperfect Information," The Quarterly Journal of Economics, Oxford University Press, vol. 90(4), pages 629-649.
- Kaïs Dachraoui & Georges Dionne & Louis Eeckhoudt & Philippe Godfroid, 2004. "Comparative Mixed Risk Aversion: Definition and Application to Self-Protection and Willingness to Pay," Journal of Risk and Uncertainty, Springer, vol. 29(3), pages 261-276, December.
- DACHRAOUI, Kaïs & DIONNE, Georges & EECKHOUDT, Louis & GODFROID, Philippe, "undated". "Comparative mixed risk aversion: definition and application to self-protection and willingness to pay," CORE Discussion Papers RP 1835, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
- Luigi Guiso & Monica Paiella, 2008. "Risk Aversion, Wealth, and Background Risk," Journal of the European Economic Association, MIT Press, vol. 6(6), pages 1109-1150, December.
- Guiso, Luigi & Paiella, Monica, 2001. "Risk Aversion, Wealth and Background Risk," CEPR Discussion Papers 2728, C.E.P.R. Discussion Papers.
- Monica Paiella & Luigi Guiso, 2004. "Risk Aversion, Wealth and Background Risk," 2004 Meeting Papers 525, Society for Economic Dynamics.
- Luigi Guiso & Monica Paiella, 2003. "Risk Aversion, Wealth and Background Risk," Temi di discussione (Economic working papers) 483, Bank of Italy, Economic Research and International Relations Area.
- Luigi Guiso & Monica Paiella, 2007. "Risk Aversion, Wealth, and Background Risk," Economics Working Papers ECO2007/47, European University Institute.
- Robert B. Barsky & F. Thomas Juster & Miles S. Kimball & Matthew D. Shapiro, 1997. "Preference Parameters and Behavioral Heterogeneity: An Experimental Approach in the Health and Retirement Study," The Quarterly Journal of Economics, Oxford University Press, vol. 112(2), pages 537-579.
- Dionne, Georges & Eeckhoudt, Louis, 1985. "Self-insurance, self-protection and increased risk aversion," Economics Letters, Elsevier, vol. 17(1-2), pages 39-42.
- DIONNE, George & EECKHOUDT, Louis, "undated". "Self-insurance, self-protection and increased risk aversion," CORE Discussion Papers RP 623, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
- Dionne, G. & Eeckhoudt, L., 1984. "Self-Insurance, Self-Protection and Increased Risk Aversion," Cahiers de recherche 8424, Universite de Montreal, Departement de sciences economiques.
- David M. Cutler & Sarah J. Reber, 1998. "Paying for Health Insurance: The Trade-Off between Competition and Adverse Selection," The Quarterly Journal of Economics, Oxford University Press, vol. 113(2), pages 433-466.
- Pierre André Chiappori & Bernard Salanié, 2002. "Testing Contract Theory: A Survey of Some Recent Work," CESifo Working Paper Series 738, CESifo Group Munich.
- Pierre-André Chiappori & Bernard Salanié, 2002. "Testing Contract Theory : A Survey of Some Recent Work," Working Papers 2002-11, Centre de Recherche en Economie et Statistique.
- Amy Finkelstein & James Poterba, 2002. "Selection Effects in the United Kingdom Individual Annuities Market," Economic Journal, Royal Economic Society, vol. 112(476), pages 28-50, January.
- Bernard Salanié, 2003. "Testing Contract Theory," CESifo Economic Studies, CESifo, vol. 49(3), pages 461-477.
- Amy Finkelstein & Kathleen McGarry, 2003. "Private Information and its Effect on Market Equilibrium: New Evidence from Long-Term Care Insurance," NBER Working Papers 9957, National Bureau of Economic Research, Inc.
- Dachraoui, K. & Dionne, G. & Eeckhoudt, L. & Godfroid, P., 2000. "Comparative Mixed Risk Aversion," Ecole des Hautes Etudes Commerciales de Montreal- 00-10, Ecole des Hautes Etudes Commerciales de Montreal-Chaire de gestion des risques..
- George A. Akerlof, 1970. "The Market for "Lemons": Quality Uncertainty and the Market Mechanism," The Quarterly Journal of Economics, Oxford University Press, vol. 84(3), pages 488-500.
- Olsson, Christina, 1999. "Essays in the Economics of Dental Insurance and Dental Health," Umeå Economic Studies 494, Umeå University, Department of Economics.
- Cameron, A. Colin & Trivedi, Pravin K., 1991. "The role of income and health risk in the choice of health insurance : Evidence from Australia," Journal of Public Economics, Elsevier, vol. 45(1), pages 1-28, June.
- Mark V. Pauly & Kate H. Withers & Krupa Subramanian-Viswana & Jean Lemaire & John C. Hershey, 2003. "Price Elasticity of Demand for Term Life Insurance and Adverse Selection," NBER Working Papers 9925, National Bureau of Economic Research, Inc. Full references (including those not matched with items on IDEAS)
When requesting a correction, please mention this item's handle: RePEc:hhs:hastef:0575. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Helena Lundin)
If references are entirely missing, you can add them using this form.