A lot of ambiguity

Zvi Safra, Uzi Segal*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We consider a risk averse decision maker who dislikes ambiguity as in the Ellsberg urns. We analyze attitudes to ambiguity when the decision maker is exposed to unrelated sequences of ambiguous situations. We discuss the Choquet expected utility, the smooth, and the maxmin models. Our main results offer conditions under which ambiguity aversion disappears even without learning and conditions under which it does not. An appendix analyzes compound gambles within the expected utility model and demonstrates how to rank them.

Original languageEnglish
Article number105393
JournalJournal of Economic Theory
StatePublished - Mar 2022
Externally publishedYes


  • Choquet expected utility
  • Compound gambles
  • Ellsberg urns
  • Maxmin
  • Repeated ambiguity
  • The smooth model


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