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Competitive Insurance Markets with Two Unobservables

  • Smart, Michael

I study a screening game in a competitive insurance market in which insurance customers differ with respect to both accident probability and degree of risk aversion. It is shown that indifference curves of customers may cross twice; thus the single crossing property does not hold. When differences in risk aversion are sufficiently large, firms cannot use policy deductibles to screen high-risk customers. Types may be pooled in equilibrium or are separated by raising premiums above actuarially fair levels. This leads to excessive entry of firms in equilibrium. Copyright 2000 by Economics Department of the University of Pennsylvania and the Osaka University Institute of Social and Economic Research Association.

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Article provided by Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association in its journal International Economic Review.

Volume (Year): 41 (2000)
Issue (Month): 1 (February)
Pages: 153-69

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Handle: RePEc:ier:iecrev:v:41:y:2000:i:1:p:153-69
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  1. Laffont, Jean-Jacques & Rochet, Jean-Charles, 1988. " Stock Market Portfolios and the Segmentation of the Insurance Market," Scandinavian Journal of Economics, Wiley Blackwell, vol. 90(3), pages 435-46.
  2. In-Koo Cho & David M. Kreps, 1997. "Signaling Games and Stable Equilibria," Levine's Working Paper Archive 896, David K. Levine.
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  6. Roger B. Myerson, 1981. "Mechanism Design by an Informed Principal," Discussion Papers 481, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  7. Wilson, Charles, 1977. "A model of insurance markets with incomplete information," Journal of Economic Theory, Elsevier, vol. 16(2), pages 167-207, December.
  8. Landsberger Michael & Meilijson Isaac, 1994. "Monopoly Insurance under Adverse Selection When Agents Differ in Risk Aversion," Journal of Economic Theory, Elsevier, vol. 63(2), pages 392-407, August.
  9. Engers, Maxim, 1987. "Signalling with Many Signals," Econometrica, Econometric Society, vol. 55(3), pages 663-74, May.
  10. Bagwell, Laurie Simon & Bernheim, B Douglas, 1996. "Veblen Effects in a Theory of Conspicuous Consumption," American Economic Review, American Economic Association, vol. 86(3), pages 349-73, June.
  11. Quinzii, Martine & Rochet, Jean-Charles, 1985. "Multidimensional signalling," Journal of Mathematical Economics, Elsevier, vol. 14(3), pages 261-284, June.
  12. 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.
  13. Maskin, Eric & Tirole, Jean, 1992. "The Principal-Agent Relationship with an Informed Principal, II: Common Values," Econometrica, Econometric Society, vol. 60(1), pages 1-42, January.
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