More ambiguity aversion or more risk aversion?

Jiankang Zhang ()
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Jiankang Zhang: Carleton University

Economic Theory Bulletin, 2022, vol. 10, issue 2, No 3, 217-232

Abstract: Abstract Using a pair of preferences $$\succeq ^{\min }$$ ⪰ min and $$\succeq ^{\max }$$ ⪰ max with utility functions $$\min _{s\in S}f\left( s\right) $$ min s ∈ S f s and $$\max _{s\in S}f\left( s\right) $$ max s ∈ S f s over the Ellsberg three color acts, this paper argues that the existing notions of attitudes toward ambiguity either mix ambiguity and risk or still involve attitudes toward risk even though ambiguity is exogenously given. Based on those observations, a new approach to defining attitudes toward ambiguity is suggested. Moreover, some relevant notions such as certainty equivalent for ambiguity and ambiguity premium are also proposed.

Keywords: Ellsberg paradox; Ambiguity; Ambiguity aversion; Risk; Risk aversion; Unambiguous event; Unambiguous act; Probabilistic sophistication; Convex capacity; Choquet expected utility; Multiple-priors model; Expected utility (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1007/s40505-022-00227-1

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