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  1. Framing Effects as Violations of Extensionality.Sacha Bourgeois-Gironde & Raphaël Giraud - 2009 - Theory and Decision 67 (4):385-404.
    Framing effects occur when different descriptions of the same decision problem give rise to divergent decisions. They can be seen as a violation of the decisiontheoretic version of the principle of extensionality (PE). The PE in logic means that two logically equivalent sentences can be substituted salva veritate. We explore what this notion of extensionality becomes in decision contexts. Violations of extensionality may have rational grounds. Based on some ideas proposed by the psychologist Craig McKenzie and colleagues, we contend that (...)
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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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    Tribute to Jean-Yves Jaffray.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.
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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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