7 found
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  1. An Experimental Investigation of Imprecision Attitude and its Relation with Risk Attitude and Impatience.Michèle Cohen, Jean-Marc Tallon & Jean-Christophe Vergnaud - 2011 - Theory and Decision 71 (1):81-110.
    We report in this paper the result of three experiments on risk, ambiguity and time attitude. The first two differed by the population considered (students vs. general population) while the third one used a different protocol and concerned students and portfolio managers. We find quite a lot of heterogeneity at the individual level. Of principal interest was the elicitation of risk, time and ambiguity attitudes and the relationship among these (model free) measures. We find that on the student population, there (...)
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  2.  29
    In Search of Good Probability Assessors: An Experimental Comparison of Elicitation Rules for Confidence Judgments.Guillaume Hollard, Sébastien Massoni & Jean-Christophe Vergnaud - 2016 - Theory and Decision 80 (3):363-387.
    In this paper, we use an experimental design to compare the performance of elicitation rules for subjective beliefs. Contrary to previous works in which elicited beliefs are compared to an objective benchmark, we consider a purely subjective belief framework. The performance of different elicitation rules is assessed according to the accuracy of stated beliefs in predicting success. We measure this accuracy using two main factors: calibration and discrimination. For each of them, we propose two statistical indexes and we compare the (...)
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  3.  22
    Confidence Measurement in the Light of Signal Detection Theory.Sã©Bastien Massoni, Thibault Gajdos & Jean-Christophe Vergnaud - 2014 - Frontiers in Psychology 5.
  4.  84
    Communication Among Agents: A Way to Revise Beliefs in KD45 Kripke Structures★.Jean-Marc Tallon, Jean-Christophe Vergnaud & Shmuel Zamir - 2004 - Journal of Applied Non-Classical Logics 14 (4):477-500.
    We address the issue of belief revision in a multi-agent setting. We represent agents' beliefs in a semantic manner, through a Kripke structure, and model a communication process by which agents communicate their beliefs to one another. We define a revision rule that can be applied even when agents have contradictory beliefs. We study its properties and show that agents need not agree after communicating their beliefs. We finally address the dynamics of revision and show that the order of communication (...)
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    Tribute to Jean-Yves Jaffray: July 22, 1939–February 26, 2009.Michèle Cohen, Alain Chateauneuf, Eric Danan, Thibault Gajdos, Raphaël Giraud, Meglena Jeleva, Fabrice Philippe, Jean-Marc Tallon & Jean-Christophe Vergnaud - 2011 - Theory and Decision 71 (1):1-10.
    Tribute to Jean-Yves Jaffray by the French Group of Decision Theory.
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    Tribute to Jean-Yves Jaffray July 22, 1939 - February 26, 2009.Michèle Cohen, Alain Chateauneuf, Eric Danan, Thibault Gajdos, Raphaël Giraud, Meglena Jeleva, Fabrice Philippe, Jean-Marc Tallon & Jean-Christophe Vergnaud - 2011 - Theory and Decision 71 (1):1-10.
    Tribute to Jean-Yves Jaffray by the French Group of Decision Theory.
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    Consistent Inconsistencies? Evidence From Decision Under Risk.Guillaume Hollard, Hela Maafi & Jean-Christophe Vergnaud - 2016 - Theory and Decision 80 (4):623-648.
    Conventional economic theory assumes that agents should be consistent across decisions. However, it is often observed that experimental subjects fail to report consistent preferences. So far, these inconsistencies are almost always examined singly. We thus wonder whether the more inconsistent individuals in one task are also more inconsistent in other tasks. We propose an experiment in which subjects are asked to report their preferences over risky bets so as to obtain, for each subject, three measures of inconsistencies: classical preference reversals, (...)
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