Results 191 to 200 of about 24,506 (225)
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Reliable Computing, 2003
Centered convex previsions and convex imprecise previsions are introduced as special classes of imprecise previsions as defined by \textit{P. Walley} [``Statistical reasoning with imprecise probabilities'' (1991; Zbl 0732.62004)]. Convex duality is used to obtain a representation theorem for such previsions, and the link is made to the theory of convex
PELESSONI, RENATO, VICIG, PAOLO
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Centered convex previsions and convex imprecise previsions are introduced as special classes of imprecise previsions as defined by \textit{P. Walley} [``Statistical reasoning with imprecise probabilities'' (1991; Zbl 0732.62004)]. Convex duality is used to obtain a representation theorem for such previsions, and the link is made to the theory of convex
PELESSONI, RENATO, VICIG, PAOLO
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Multiobjective Decision-Making, de Finetti Prevision and Fuzzy Prevision
2013We introduce an approach to multiobjective decision-making in the context of finite de Finetti random numbers. The objectives are events, the action of an alternative A with respect to an objective O is seen as a finite de Finetti conditional random number A/O and the global effect of A over O, i.e., the score of A with respect to O, is the de Finetti ...
Maturo, Antonio +1 more
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Journal of the American Statistical Association, 1983
Abstract We prove that the result EX = E(E(X | Y)) is true, for bounded X, when the usual concept of conditional expectation or prevision is replaced by an alternative definition reflecting an individual's actual beliefs concerning X after observing Y. We discuss the importance of this result to subjectivist theory.
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Abstract We prove that the result EX = E(E(X | Y)) is true, for bounded X, when the usual concept of conditional expectation or prevision is replaced by an alternative definition reflecting an individual's actual beliefs concerning X after observing Y. We discuss the importance of this result to subjectivist theory.
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IMPRECISE PREVISIONS FOR RISK MEASUREMENT
International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems, 2003In this paper the theory of coherent imprecise previsions is applied to risk measurement. We introduce the notion of coherent risk measure defined on an arbitrary set of risks, showing that it can be considered a special case of coherent upper prevision.
PELESSONI, RENATO, VICIG, PAOLO
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Probability Inequalities with Imprecise Previsions
We investigate how various well known probability inequalities extend to lower and upper previsions. Our focus is especially on Markov’s, Bhatia-Davis, Jensen’s and Cantelli’s inequalities. In all such cases, imprecise versions of these inequalities are available even requiring the weak consistency notion of 2-coherence, which implies that they obtain ...Pelessoni, Renato, Vicig, Paolo
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Futures, futuribles, previsions, Prognosen
Futures, 1989Two hundred years ago the image of the future was for the most part a blank, save for the possibility of balloon travel and the hopes that after the extraordinary events of 1789 the government of France would change for the better. One hundred years later the idea of the future had become part of general thinking, thanks to many writers as different as
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Political Science and Prevision
American Political Science Review, 1965The political scientist is a teacher of public men in the making, and an adviser of public men in activity; “public men,” that is, men who are taught, invited or assumed to feel some responsibility for the exercise of political power; “political power,” that is, concentrated means of affecting the future.Obviously we can not affect the past, or that ...
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Prevision et prospective — exemples
The Tourist Review, 1992Autant il nous apparat que le tourisme a fait l'objet de nombreuses études prévisionnelles autant les études prospectives nous paraissent rares. Rares dans la mesure où nous retiendrons pour être vraiment de la prospective “une attitude d'esprit (l'anticipation et la volonté) et un comportement (l'imagination et l'espoir) mobilisés pour assurer la ...
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