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Adaptive preferences: An evolutionary model of non-expected utility and ambiguity aversion

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  • Sadowski, Philipp
  • Sarver, Todd
Abstract
We enrich an evolutionary model with common and idiosyncratic uncertainty as in Robson (1996) by allowing for hidden actions (or phenotypic flexibility). In contexts where common uncertainty is ambiguous and idiosyncratic uncertainty is risky, the model generates both ambiguity aversion and non-expected-utility preferences for risk, thereby providing a link between the two types of behavior. While the general evolutionarily optimal objective function does not have an obvious similarity to functional forms studied in the literature, our main results show that it can be recast as a combination of familiar models of ambiguity aversion and non-expected utility. We show that particular classes of hidden actions generate the special cases of rank-dependent or divergence risk preferences embedded within a model of ambiguity aversion.

Suggested Citation

  • Sadowski, Philipp & Sarver, Todd, 2024. "Adaptive preferences: An evolutionary model of non-expected utility and ambiguity aversion," Journal of Economic Theory, Elsevier, vol. 218(C).
  • Handle: RePEc:eee:jetheo:v:218:y:2024:i:c:s0022053124000462
    DOI: 10.1016/j.jet.2024.105840
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    References listed on IDEAS

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    More about this item

    Keywords

    Evolution of preferences; Ambiguity; Non-expected utility; Phenotypic flexibility;
    All these keywords.

    JEL classification:

    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty
    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness
    • D84 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Expectations; Speculations

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