Does Adverse Selection Matter? Evidence from a Natural Experiment
AbstractThe 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.
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Bibliographic InfoPaper provided by Stockholm School of Economics in its series Working Paper Series in Economics and Finance with number 575.
Length: 38 pages
Date of creation: 10 Nov 2004
Date of revision:
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Asymmetric information; Adverse Selection; Advantageous Selection; Health Insurance;
Find related papers by JEL classification:
- D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty
- D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
- G22 - Financial Economics - - Financial Institutions and Services - - - Insurance; Insurance Companies; Actuarial Studies
- I11 - Health, Education, and Welfare - - Health - - - Analysis of Health Care Markets
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- 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.
- 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.
- 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.
- Tomas Philipson & John Cawley, 1999. "An Empirical Examination of Information Barriers to Trade in Insurance," American Economic Review, American Economic Association, vol. 89(4), pages 827-846, September.
- 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.
- DACHRAOUI, Kaïs & DIONNE, Georges & EECKHOUDT, Louis & GODFROID, Philippe, .
"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).
- 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.
- Luigi Guiso & Monica Paiella, 2007.
"Risk Aversion, Wealth, and Background Risk,"
Economics Working Papers
ECO2007/47, European University Institute.
- 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.
- Monica Paiella & Luigi Guiso, 2004. "Risk Aversion, Wealth and Background Risk," 2004 Meeting Papers 525, Society for Economic Dynamics.
- Guiso, Luigi & Paiella, Monica, 2001. "Risk Aversion, Wealth and Background Risk," CEPR Discussion Papers 2728, C.E.P.R. Discussion Papers.
- Dionne, Georges & Eeckhoudt, Louis, 1985.
"Self-insurance, self-protection and increased risk aversion,"
Elsevier, vol. 17(1-2), pages 39-42.
- Dionne, G. & Eeckhoudt, L., 1984. "Self-Insurance, Self-Protection and Increased Risk Aversion," Cahiers de recherche 8424, Universite de Montreal, Departement de sciences economiques.
- DIONNE, George & EECKHOUDT, Louis, . "Self-insurance, self-protection and increased risk aversion," CORE Discussion Papers RP -623, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
- 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.
- David M. Cutler & Sarah J. Reber, 1998.
"Paying For Health Insurance: The Trade-Off Between Competition And Adverse Selection,"
The Quarterly Journal of Economics,
MIT Press, vol. 113(2), pages 433-466, May.
- David M. Cutler & Sarah Reber, 1996. "Paying for Health Insurance: The Tradeoff between Competition and Adverse Selection," NBER Working Papers 5796, National Bureau of Economic Research, Inc.
- Pierre-André Chiappori & Bernard Salanié, 2002.
"Testing Contract Theory : A Survey of Some Recent Work,"
2002-11, Centre de Recherche en Economie et Statistique.
- Pierre André Chiappori & Bernard Salanié, 2002. "Testing Contract Theory: A Survey of Some Recent Work," CESifo Working Paper Series 738, CESifo Group Munich.
- 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.
- 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.
- 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.
- Barsky, Robert B, et al, 1997. "Preference Parameters and Behavioral Heterogeneity: An Experimental Approach in the Health and Retirement Study," The Quarterly Journal of Economics, MIT Press, vol. 112(2), pages 537-79, May.
- Olsson, Christina, 1999. "Essays in the Economics of Dental Insurance and Dental Health," UmeÃ¥ Economic Studies 494, Umeå University, Department of Economics.
- 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.
- Akerlof, George A, 1970. "The Market for 'Lemons': Quality Uncertainty and the Market Mechanism," The Quarterly Journal of Economics, MIT Press, vol. 84(3), pages 488-500, August.
- 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..
- 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.
- Grönqvist, Erik, 2006. "(M)oral Hazard?," Working Paper Series in Economics and Finance 642, Stockholm School of Economics.
- Health insurance mandate in Wikipedia English ne '')
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