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Risk and Uncertainty in Health Investment

  • Takao Asano

    ()

    (Faculty of Economics, Okayama University)

  • Akihisa Shibata

    ()

    (Institute of Economic Research, Kyoto University)

Extending the Grossman [12] model of health capital into a stochastic one, we analyze how the presence of Knightian uncertainty about the efficacy of health care affects the optimal health investment behavior of individuals. Using Gilboa and Schmeidler's [11] model of maxmin expected utility (MMEU) with multiple priors, we show that an agent retains the initial level of health capital if the price of health care lies within a certain range. We also show that the no-investment range expands as the degree of Knightian uncertainty rises.

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File URL: http://www.kier.kyoto-u.ac.jp/DP/DP696.pdf
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Paper provided by Kyoto University, Institute of Economic Research in its series KIER Working Papers with number 696.

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Length: 18pages
Date of creation: Mar 2010
Date of revision:
Handle: RePEc:kyo:wpaper:696
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  1. Nishimura, Kiyohiko G. & Ozaki, Hiroyuki, 2007. "Irreversible investment and Knightian uncertainty," Journal of Economic Theory, Elsevier, vol. 136(1), pages 668-694, September.
  2. Laibson, David, 1997. "Golden Eggs and Hyperbolic Discounting," The Quarterly Journal of Economics, MIT Press, vol. 112(2), pages 443-77, May.
  3. Selden, Thomas M., 1993. "Uncertainty and health care spending by the poor: The health capital model revisited," Journal of Health Economics, Elsevier, vol. 12(1), pages 109-115, April.
  4. Marcus Berliant & Hideo Konishi, 2004. "Salience: Agenda Choices by Competing Candidates," Game Theory and Information 0407003, EconWPA.
  5. Chang, Fwu-Ranq, 1996. "Uncertainty and investment in health," Journal of Health Economics, Elsevier, vol. 15(3), pages 369-376, June.
  6. Dow, James & Werlang, Sergio Ribeiro da Costa, 1992. "Uncertainty Aversion, Risk Aversion, and the Optimal Choice of Portfolio," Econometrica, Econometric Society, vol. 60(1), pages 197-204, January.
  7. Adam Oliver, 2000. "Uncertainty aversion: a reply to the paper by Andersson and Lyttkens," Health Economics, John Wiley & Sons, Ltd., vol. 9(3), pages 253-255.
  8. W. Pesendorfer & F. Gul, 1999. "Temptation and Self-Control," Princeton Economic Theory Papers 99f1, Economics Department, Princeton University.
  9. Grossman, Michael, 1972. "On the Concept of Health Capital and the Demand for Health," Journal of Political Economy, University of Chicago Press, vol. 80(2), pages 223-55, March-Apr.
  10. David Schmeidler, 1989. "Subjective Probability and Expected Utility without Additivity," Levine's Working Paper Archive 7662, David K. Levine.
  11. Picone, Gabriel & Uribe, Martin & Mark Wilson, R., 1998. "The effect of uncertainty on the demand for medical care, health capital and wealth," Journal of Health Economics, Elsevier, vol. 17(2), pages 171-185, April.
  12. Dardanoni, Valentino & Wagstaff, Adam, 1987. "Uncertainty, inequalities in health and the demand for health," Journal of Health Economics, Elsevier, vol. 6(4), pages 283-290, December.
  13. Peter P. Wakker, 2000. "Uncertainty aversion: a discussion of critical issues in health economics," Health Economics, John Wiley & Sons, Ltd., vol. 9(3), pages 261-263.
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