Theory and Decision

, Volume 71, Issue 1, pp 11–22 | Cite as

Jaffray’s ideas on ambiguity

  • Peter P. WakkerEmail author
Open Access


This paper discusses Jean-Yves Jaffray’s ideas on ambiguity and the views underlying his ideas. His models, developed 20 years ago, provide the most tractable separation of risk attitudes, ambiguity attitudes, and ambiguity beliefs available in the literature today.


Ambiguity Total absence of information Belief functions 

JEL Classification

D81 D03 


Open Access

This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.


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Copyright information

© The Author(s) 2010

Authors and Affiliations

  1. 1.Econometric InstituteErasmus UniversityRotterdamThe Netherlands

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