A definition of uncertainty or ambiguity aversion is proposed. It is argued that the definition is well-suited to modelling within the Savage (as opposed to Anscombe and Aumann) domain of acts. The defined property of uncertainty aversion has intuitive empirical content, behaves well in specific models of preference (multiple-priors and Choquet expected utility) and is tractable. Tractability is established through use of a nonstandard notion of differentiability for utility functions, called eventwise differentiability.
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Paper provided by University of Toronto, Department of Economics in its series Working Papers with number
epstein-97-01.
Length: 48 pages Date of creation: 09 Jul 1997 Date of revision: Handle: RePEc:tor:tecipa:epstein-97-01
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Find related papers by JEL classification: D80 - Microeconomics - - Information, Knowledge, and Uncertainty - - - General D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty
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