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Ambiguity aversion, risk aversion, and the weight of evidence

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  • Edi Karni

    (Johns Hopkins University)

Abstract

Wakker (Theory Decis 29:119–132, 1990) proved that the rank-dependent utility model is a special case of Choquet expected utility model. Invoking this result and applying the certainty equivalent reduction procedure, this paper shows that risk aversion in the rank-dependent utility model implies ambiguity aversion in the corresponding Choquet expected utility model. Consequently, the pattern of choice depicted by Ellsberg’s experiments and, more generally, preference for evidence to support their beliefs is an expression of decision makers’ risk aversion. In addition, the paper introduces a new procedure of updating capacities by the application of Bayes rule that smooth ambiguity aversion may also be regarded as risk aversion.

Suggested Citation

  • Edi Karni, 2024. "Ambiguity aversion, risk aversion, and the weight of evidence," Theory and Decision, Springer, vol. 97(4), pages 595-611, December.
    • Handle: RePEc:kap:theord:v:97:y:2024:i:4:d:10.1007_s11238-024-09995-7
    DOI: 10.1007/s11238-024-09995-7
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    References listed on IDEAS

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    1. Segal, Uzi, 1990. "Two-Stage Lotteries without the Reduction Axiom," Econometrica, Econometric Society, vol. 58(2), pages 349-377, March.
    2. Yaari, Menahem E, 1987. "The Dual Theory of Choice under Risk," Econometrica, Econometric Society, vol. 55(1), pages 95-115, January.
    3. Gilboa Itzhak & Schmeidler David, 1993. "Updating Ambiguous Beliefs," Journal of Economic Theory, Elsevier, vol. 59(1), pages 33-49, February.
    4. Hong, Chew Soo & Karni, Edi & Safra, Zvi, 1987. "Risk aversion in the theory of expected utility with rank dependent probabilities," Journal of Economic Theory, Elsevier, vol. 42(2), pages 370-381, August.
    5. Quiggin, John, 1982. "A theory of anticipated utility," Journal of Economic Behavior & Organization, Elsevier, vol. 3(4), pages 323-343, December.
    6. Nakamura, Yutaka, 1990. "Subjective expected utility with non-additive probabilities on finite state spaces," Journal of Economic Theory, Elsevier, vol. 51(2), pages 346-366, August.
    7. Segal, Uzi, 1993. "The Measure Representation: A Correction," Journal of Risk and Uncertainty, Springer, vol. 6(1), pages 99-107, January.
    8. Gilboa, Itzhak, 1987. "Expected utility with purely subjective non-additive probabilities," Journal of Mathematical Economics, Elsevier, vol. 16(1), pages 65-88, February.
    9. Segal, Uzi, 1987. "The Ellsberg Paradox and Risk Aversion: An Anticipated Utility Approach," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 28(1), pages 175-202, February.
    10. Kyoungwon Seo, 2009. "Ambiguity and Second-Order Belief," Econometrica, Econometric Society, vol. 77(5), pages 1575-1605, September.
    11. Hong Chew Soo & Karni Edi, 1994. "Choquet Expected Utility with a Finite State Space: Commutativity and Act-Independence," Journal of Economic Theory, Elsevier, vol. 62(2), pages 469-479, April.
    12. Peter Klibanoff & Massimo Marinacci & Sujoy Mukerji, 2005. "A Smooth Model of Decision Making under Ambiguity," Econometrica, Econometric Society, vol. 73(6), pages 1849-1892, November.
    13. Daniel Ellsberg, 1961. "Risk, Ambiguity, and the Savage Axioms," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 75(4), pages 643-669.
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