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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. Are Beliefs a Matter of Taste? A Case for Objective Imprecise Information.Raphaël Giraud & Jean-Marc Tallon - 2011 - Theory and Decision 71 (1):23-32.
    We argue, in the spirit of some of Jean-Yves Jaffray's work, that explicitly incorporating the information, however imprecise, available to the decision maker is relevant, feasible, and fruitful. In particular, we show that it can lead us to know whether the decision maker has wrong beliefs and whether it matters or not, that it makes it possible to better model and analyze how the decision maker takes into account new information, even when this information is not an event and finally (...)
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    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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