IDEAS home Printed from https://ideas.repec.org/
MyIDEAS: Log in (now much improved!) to save this paper

Sources of Advantageous Selection: Evidence from the Medigap Insurance Market

  • Fang, Hanming

    (Yale U)

  • Keane, Michael
  • Silverman, Dan

    (U of Michigan)

We provide strong evidence of advantageous selection in the Medigap insurance market, and analyze its sources. Using Medicare Current Beneficiary Survey (MCBS) data, we find that, conditional on controls for the price of Medigap, medical expenditures for senior citizens with Medigap coverage are, on average, about $4,000 less than for those without. But, if we condition on health, expenditures for seniors on Medigap are about $2,000 more. These two findings can only be reconciled if those with less health expenditure risk are more likely to purchase Medigap, implying advantageous selection. By combining the MCBS and the Health and Retirement Study (HRS), we investigate the sources of this advantageous selection. These include income, education, longevity expectations and financial planing horizons, as well as cognitive ability. Once we condition on all these factors, seniors with higher expected medical expenditure are indeed more likely to purchase Medigap. Surprisingly, risk preferences do not appear to be a source of advantageous selection. But cognitive ability emerges as a particularly important factor, consistent with a view that many senior citizens have difficulty understanding Medicare and Medigap rules.

If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.

File URL: http://economics.yale.edu/sites/default/files/files/Working-Papers/wp000/ddp0017.pdf
Download Restriction: no

Paper provided by Yale University, Department of Economics in its series Working Papers with number 17.

as
in new window

Length:
Date of creation: May 2006
Date of revision:
Handle: RePEc:ecl:yaleco:17
Contact details of provider: Postal:
PO Box 8268, New Haven CT 06520-8268

Phone: (203) 432-3576
Fax: (203) 432-5779
Web page: http://www.econ.yale.edu/ddp/

More information through EDIRC

References listed on IDEAS
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.:

as in new window
  1. Pierre‐André Chiappori & Bruno Jullien & Bernard Salanié & François Salanié, 2006. "Asymmetric information in insurance: general testable implications," RAND Journal of Economics, RAND Corporation, vol. 37(4), pages 783-798, December.
  2. 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.
  3. Georges Dionne & Christian Gourieroux & Charles Vanasse, 2001. "Testing for Evidence of Adverse Selection in the Automobile Insurance Market: A Comment," Journal of Political Economy, University of Chicago Press, vol. 109(2), pages 444-473, April.
  4. Davidson, Bruce N. & Sofaer, Shoshanna & Gertler, Paul, 1992. "Consumer information and biased selection in the demand for coverage supplementing medicare," Social Science & Medicine, Elsevier, vol. 34(9), pages 1023-1034, May.
  5. Jaap H. Abbring & Pierre-Andre Chiappori, 2004. "Moral Hazard and Dynamic Insurance Data," 2004 Meeting Papers 316, Society for Economic Dynamics.
  6. Araújo, Aloísio Pessoa de & Moreira, Humberto Ataíde, 2002. "Non-monotone insurance contracts and their empirical consequences," Economics Working Papers (Ensaios Economicos da EPGE) 512, FGV/EPGE Escola Brasileira de Economia e Finanças, Getulio Vargas Foundation (Brazil).
  7. Pierre-André Chiappori & Bernard Salanié, 1997. "Testing for Asymmetric Information in Insurance Markets," Working Papers 97-11, Centre de Recherche en Economie et Statistique.
  8. repec:mpr:mprres:2864 is not listed on IDEAS
  9. Cutler, David & McGarry, Kathleen & Finkelstein, Amy, 2008. "Preference Heterogeneity and Insurance Markets: Explaining a Puzzle of Insurance," Scholarly Articles 2640581, Harvard University Department of Economics.
  10. Alma Cohen & Liran Einav, 2005. "Estimating Risk Preferences from Deductible Choice," NBER Working Papers 11461, National Bureau of Economic Research, Inc.
  11. 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.
  12. Hurd, Michael D. & McGarry, Kathleen, 1997. "Medical insurance and the use of health care services by the elderly," Journal of Health Economics, Elsevier, vol. 16(2), pages 129-154, April.
  13. Manuel Arellano & Costas Meghir, 1992. "Female Labour Supply and On-the-Job Search: An Empirical Model Estimated Using Complementary Data Sets," Review of Economic Studies, Oxford University Press, vol. 59(3), pages 537-559.
  14. Alma Cohen, 2005. "Asymmetric Information and Learning: Evidence from the Automobile Insurance Market," The Review of Economics and Statistics, MIT Press, vol. 87(2), pages 197-207, May.
  15. 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.
  16. Joshua D. Angrist & Alan B. Krueger, 1990. "The Effect of Age at School Entry on Educational Attainment: An Application of Instrumental Variables with Moments from Two Samples," NBER Working Papers 3571, National Bureau of Economic Research, Inc.
  17. Amy Finkelstein & James Poterba, 2006. "Testing for Asymmetric Information Using 'Unused Observables' in Insurance Markets: Evidence from the U.K. Annuity Market," NBER Working Papers 12112, National Bureau of Economic Research, Inc.
  18. Puelz, Robert & Snow, Arthur, 1994. "Evidence on Adverse Selection: Equilibrium Signaling and Cross-Subsidization in the Insurance Market," Journal of Political Economy, University of Chicago Press, vol. 102(2), pages 236-57, April.
  19. Finkelstein, Amy, 2004. "Minimum standards, insurance regulation and adverse selection: evidence from the Medigap market," Journal of Public Economics, Elsevier, vol. 88(12), pages 2515-2547, December.
  20. 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.
  21. Thomas Davidoff & Jeffrey R. Brown & Peter A. Diamond, 2003. "Annuities and Individual Welfare," NBER Working Papers 9714, National Bureau of Economic Research, Inc.
  22. Jullien, Bruno & Salanié, Bernard & Salanié, François, 2001. "Screening Risk-Averse Agents Under Moral Hazard," IDEI Working Papers 131, Institut d'Économie Industrielle (IDEI), Toulouse.
  23. Menahem E. Yaari, 1965. "Uncertain Lifetime, Life Insurance, and the Theory of the Consumer," Review of Economic Studies, Oxford University Press, vol. 32(2), pages 137-150.
  24. Jean Pinquet & Pierre-André Chiappori & Jaap Abbring & James J Heckman, 2003. "Adverse selection and moral hazard in insurance: can dynamic data help to distinguish?," Post-Print hal-00397115, HAL.
  25. David Hemenway, 1990. "Propitious Selection," The Quarterly Journal of Economics, Oxford University Press, vol. 105(4), pages 1063-1069.
  26. Wilson, Charles, 1977. "A model of insurance markets with incomplete information," Journal of Economic Theory, Elsevier, vol. 16(2), pages 167-207, December.
  27. Amy Finkelstein & James Poterba, 2000. "Adverse Selection in Insurance Markets: Policyholder Evidence from the U.K. Annuity Market," NBER Working Papers 8045, National Bureau of Economic Research, Inc.
  28. F. Thomas Juster & Richard Suzman, 1995. " An Overview of the Health and Retirement Study," Journal of Human Resources, University of Wisconsin Press, vol. 30, pages s7-s56.
  29. Lucie Schmidt, 2008. "Risk preferences and the timing of marriage and childbearing," Demography, Springer;Population Association of America (PAA), vol. 45(2), pages 439-460, May.
  30. 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.
  31. Kerwin Kofi Charles & Erik Hurst, 2002. "The Correlation of Welath Across Generations," NBER Working Papers 9314, National Bureau of Economic Research, Inc.
  32. Dahlby, B. G., 1983. "Adverse selection and statistical discrimination : An analysis of Canadian automobile insurance," Journal of Public Economics, Elsevier, vol. 20(1), pages 121-130, February.
  33. repec:rus:hseeco:16303 is not listed on IDEAS
  34. Peter Cunningham Charles Denk Michael Sinclair, 2001. "Do Consumers Know How Their Health Plan Works," Mathematica Policy Research Reports 81cfa1d337584a508570b6550, Mathematica Policy Research.
  35. Wolfe, John R. & Goddeeris, John H., 1991. "Adverse selection, moral hazard, and wealth effects in the medigap insurance market," Journal of Health Economics, Elsevier, vol. 10(4), pages 433-459.
  36. Gábor Kézdi & Robert J. Willis, 2003. "Who Becomes a Stockholder? Expectations, SUbjective Uncertainty, and Asset Allocation," Working Papers wp039, University of Michigan, Michigan Retirement Research Center.
  37. Jean Pinquet & Jaap Abbring & Pierre-André Chiappori, 2003. "Moral Hazard and Dynamic Insurance Data," Post-Print hal-00397121, HAL.
  38. Hemenway, David, 1992. "Propitious Selection in Insurance," Journal of Risk and Uncertainty, Springer, vol. 5(3), pages 247-51, July.
  39. Harris, Katherine M. & Keane, Michael P., 1998. "A model of health plan choice:: Inferring preferences and perceptions from a combination of revealed preference and attitudinal data," Journal of Econometrics, Elsevier, vol. 89(1-2), pages 131-157, November.
  40. Lillard, L.A. & Rogowski, J., 1995. "Does Supplemental Private Insurance Increase Medicare Costs?," Papers 95-16, RAND - Labor and Population Program.
  41. Amy Finkelstein & Kathleen McGarry, 2006. "Multiple Dimensions of Private Information: Evidence from the Long-Term Care Insurance Market," American Economic Review, American Economic Association, vol. 96(4), pages 938-958, September.
  42. de Meza, David & Webb, David C, 2001. "Advantageous Selection in Insurance Markets," RAND Journal of Economics, The RAND Corporation, vol. 32(2), pages 249-62, Summer.
  43. Cardon, James H & Hendel, Igal, 2001. "Asymmetric Information in Health Insurance: Evidence from the National Medical Expenditure Survey," RAND Journal of Economics, The RAND Corporation, vol. 32(3), pages 408-27, Autumn.
  44. Ettner, Susan L., 1997. "Adverse selection and the purchase of Medigap insurance by the elderly," Journal of Health Economics, Elsevier, vol. 16(5), pages 543-562, October.
  45. Lusardi, Annamaria, 1998. "On the Importance of the Precautionary Saving Motive," American Economic Review, American Economic Association, vol. 88(2), pages 449-53, May.
  46. Keane, Michael, 2004. "Modeling Health Insurance Choice Using the Heterogeneous Logit Model," MPRA Paper 55203, University Library of Munich, Germany.
  47. Kan, Kamhon, 2003. "Residential mobility and job changes under uncertainty," Journal of Urban Economics, Elsevier, vol. 54(3), pages 566-586, November.
  48. 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.
  49. Jeffrey R. Brown & Amy Finkelstein, 2004. "Supply or Demand: Why is the Market for Long-Term Care Insurance So Small?," NBER Working Papers 10782, National Bureau of Economic Research, Inc.
  50. 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.
Full references (including those not matched with items on IDEAS)

This item is featured on the following reading lists or Wikipedia pages:

  1. Sources of Advantageous Selection: Evidence from the Medigap Insurance Market (JPE 2008) in ReplicationWiki

When requesting a correction, please mention this item's handle: RePEc:ecl:yaleco:17. 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: ()

If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

If references are entirely missing, you can add them using this form.

If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

Please note that corrections may take a couple of weeks to filter through the various RePEc services.

This information is provided to you by IDEAS at the Research Division of the Federal Reserve Bank of St. Louis using RePEc data.