Econometrica

Journal Of The Econometric Society

An International Society for the Advancement of Economic
Theory in its Relation to Statistics and Mathematics

Edited by: Guido W. Imbens • Print ISSN: 0012-9682 • Online ISSN: 1468-0262

Econometrica: Sep, 2009, Volume 77, Issue 5

Ambiguity and Second‐Order Belief

https://doi.org/10.3982/ECTA6727
p. 1575-1605

Kyoungwon Seo

Anscombe and Aumann (1963) wrote a classic characterization of subjective expected utility theory. This paper employs the same domain for preference and a closely related (but weaker) set of axioms to characterize preferences that use second‐order beliefs (beliefs over probability measures). Such preferences are of interest because they accommodate Ellsberg‐type behavior.


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