5 found
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  1.  98
    Regular Updating.Alain Chateauneuf, Thibault Gajdos & Jean-Yves Jaffray - 2011 - Theory and Decision 71 (1):111-128.
    We study the Full Bayesian Updating rule for convex capacities. Following a route suggested by Jaffray (IEEE Transactions on Systems, Man and Cybernetics 22(5):1144–1152, 1992), we define some properties one may want to impose on the updating process, and identify the classes of (convex and strictly positive) capacities that satisfy these properties for the Full Bayesian Updating rule. This allows us to characterize two parametric families of convex capacities: ${(\varepsilon,\delta)}$ -contaminations (which were introduced, in a slightly different form, by Huber (...)
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  2.  36
    Coherent Bets Under Partially Resolving Uncertainty and Belief Functions.Jean-Yves Jaffray - 1989 - Theory and Decision 26 (2):99-105.
  3.  27
    How to Deal with Partially Analyzable Acts?Jean-Yves Jaffray & Meglena Jeleva - 2011 - Theory and Decision 71 (1):129-149.
    In some situations, a decision is best represented by an incompletely analyzed act: conditionally on a given event A, the consequences of the decision on sub-events are perfectly known and uncertainty becomes probabilizable, whereas the plausibility of this event itself remains vague and the decision outcome on the complementary event ${\bar{A}}$ is imprecisely known. In this framework, we study an axiomatic decision model and prove a representation theorem. Resulting decision criteria aggregate partial evaluations consisting of (i) the conditional expected utility (...)
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  4.  44
    Constrained Egalitarianism in a Simple Redistributive Model.Jean-Yves Jaffray & Philippe Mongin - 2003 - Theory and Decision 54 (1):33-56.
    The paper extends a result in Dutta and Ray's (1989) theory of constrained egalitarianism initiated by relying on the concept of proportionate rather than absolute equality. We apply this framework to redistributive systems in which what the individuals get depends on what they receive or pay qua members of generally overlapping groups. We solve the constrained equalization problem for this class of models. The paper ends up comparing our solution with the alternative solution based on the Shapley value, which has (...)
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  5.  23
    Interpersonal Level Comparability Does Not Imply Comparability of Utility Differences? A Comment on Ng.Jean-Yves Jaffray - 1985 - Theory and Decision 19 (2):201-203.
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