Foundations of ambiguity models under symmetry: α-MEU and smooth ambiguity

Peter Klibanoff, Sujoy Mukerji, Kyoungwon Seo and Lorenzo Staca
Additional contact information
Peter Klibanoff: Northwestern University
Kyoungwon Seo: Seoul National University
Lorenzo Staca: Northwestern University

No 922, Working Papers from Queen Mary University of London, School of Economics and Finance

Abstract: The α-MEU model and the smooth ambiguity model are two popular models in decision making under ambiguity. However, the axiomatic foundations of these two models are not completely understood. We provide axiomatic foundations of these models in a symmetric setting with a product state space . This setting allows marginals over S to be linked behaviorally with (limiting frequency) events. Bets on such events are shown to reveal the i.i.d. measures that are relevant for the decision maker's preferences and appear in the representations. By characterizing both models within a common framework, it becomes possible to better compare and relate them.

Keywords: Symmetry; beliefs; ambiguity; multiple priors; smooth ambiguity (search for similar items in EconPapers)
JEL-codes: D01 D80 D81 D83 (search for similar items in EconPapers)
Date: 2021-01-13
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Journal Article: Foundations of ambiguity models under symmetry: α-MEU and smooth ambiguity (2022)
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Persistent link: https://EconPapers.repec.org/RePEc:qmw:qmwecw:922

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