Belief hedges: Measuring ambiguity for all events and all models

Aurélien Baillon, Han Bleichrodt, Chen Li, Peter P. Wakker*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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We introduce belief hedges, i.e., sets of events whose uncertain subjective beliefs neutralize each other. Belief hedges allow us to measure ambiguity attitudes without knowing those subjective beliefs. They lead to improved ambiguity indexes that are valid under all popular ambiguity theories. Our indexes can be applied to real-world problems and do not require expected utility for risk or commitments to two-stage optimization, thereby increasing their descriptive power. Belief hedges make ambiguity theories widely applicable.

Original languageEnglish
Article number105353
Number of pages28
JournalJournal of Economic Theory
Publication statusPublished - Dec 2021

Bibliographical note

JEL classification: D81; C91
Publisher Copyright:
© 2021


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