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A Characterization of Risk-Neutral and Ambiguity-Averse Behavior

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  • Gerasimou, Georgios

Abstract

This paper studies a decision maker who chooses monetary bets/investment portfolios under pure uncertainty. Necessary and sufficient conditions on his preferences over these objects are provided for his choice behavior to be guided by the *maxmin expected value* rule, and therefore to exhibit both ``risk neutrality'' and ambiguity aversion. This result is obtained as an extension of a simple re-characterization of de Finetti's theorem on maximization of subjective expected value.

Suggested Citation

  • Gerasimou, Georgios, 2015. "A Characterization of Risk-Neutral and Ambiguity-Averse Behavior," MPRA Paper 68159, University Library of Munich, Germany.
    • Handle: RePEc:pra:mprapa:68159
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    File URL: https://mpra.ub.uni-muenchen.de/68326/8/MPRA_paper_68326.pdf
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    References listed on IDEAS

    as
    1. Aloisio Araujo & Alain Chateauneuf & José Faro, 2012. "Pricing rules and Arrow–Debreu ambiguous valuation," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 49(1), pages 1-35, January.
    2. Gilboa,Itzhak, 2009. "Theory of Decision under Uncertainty," Cambridge Books, Cambridge University Press, number 9780521517324.
    3. Schmeidler, David, 1989. "Subjective Probability and Expected Utility without Additivity," Econometrica, Econometric Society, vol. 57(3), pages 571-587, May.
    4. Gilboa, Itzhak & Schmeidler, David, 1989. "Maxmin expected utility with non-unique prior," Journal of Mathematical Economics, Elsevier, vol. 18(2), pages 141-153, April.
    5. Casadesus-Masanell, Ramon & Klibanoff, Peter & Ozdenoren, Emre, 2000. "Maxmin Expected Utility over Savage Acts with a Set of Priors," Journal of Economic Theory, Elsevier, vol. 92(1), pages 35-65, May.
    6. Alon, Shiri & Schmeidler, David, 2014. "Purely subjective Maxmin Expected Utility," Journal of Economic Theory, Elsevier, vol. 152(C), pages 382-412.
    7. Ramon Casadesus-Masanell & Peter Klibanoff & Emre Ozdenoren, 1998. "Maximum Expected Utility over Savage Acts with a Set of Priors," Discussion Papers 1218, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
    8. Charalambos D. Aliprantis & Kim C. Border, 2006. "Infinite Dimensional Analysis," Springer Books, Springer, edition 0, number 978-3-540-29587-7, December.
    Full references (including those not matched with items on IDEAS)

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    More about this item

    Keywords

    Maxmin expected value; ambiguity aversion; risk neutrality; multiple priors; de Finetti.;
    All these keywords.

    JEL classification:

    • D01 - Microeconomics - - General - - - Microeconomic Behavior: Underlying Principles
    • D03 - Microeconomics - - General - - - Behavioral Microeconomics: Underlying Principles
    • D11 - Microeconomics - - Household Behavior - - - Consumer Economics: Theory

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