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Jean Baccelli
Oxford University
  1. Support for Geometric Pooling.Jean Baccelli & Rush T. Stewart - forthcoming - Review of Symbolic Logic:1-40.
    Supra-Bayesianism is the Bayesian response to learning the opinions of others. Probability pooling constitutes an alternative response. One natural question is whether there are cases where probability pooling gives the supra-Bayesian result. This has been called the problem of Bayes-compatibility for pooling functions. It is known that in a common prior setting, under standard assumptions, linear pooling cannot be non-trivially Bayes-compatible. We show by contrast that geometric pooling can be non-trivially Bayes-compatible. Indeed, we show that, under certain assumptions, geometric and (...)
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  2. Do Bets Reveal Beliefs?Jean Baccelli - 2017 - Synthese 194 (9):3393-3419.
    This paper examines the preference-based approach to the identification of beliefs. It focuses on the main problem to which this approach is exposed, namely that of state-dependent utility. First, the problem is illustrated in full detail. Four types of state-dependent utility issues are distinguished. Second, a comprehensive strategy for identifying beliefs under state-dependent utility is presented and discussed. For the problem to be solved following this strategy, however, preferences need to extend beyond choices. We claim that this a necessary feature (...)
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  3.  73
    Interpersonal Comparisons of What?Jean Baccelli - forthcoming - Journal of Philosophy.
    I examine the once popular claim according to which interpersonal comparisons of welfare are necessary for social choice. I side with current social choice theorists in emphasizing that, on a narrow construal, this necessity claim is refuted beyond appeal. However, I depart from the opinion presently prevailing in social choice theory in highlighting that on a broader construal, this claim proves not only compatible with, but even comforted by, the current state of the field. I submit that all in all, (...)
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  4. Expected utility theory, Jeffrey’s decision theory, and the paradoxes.Philippe Mongin & Jean Baccelli - 2020 - Synthese 199 (1):695-713.
    In Richard Bradley’s book, Decision Theory with a Human Face, we have selected two themes for discussion. The first is the Bolker-Jeffrey theory of decision, which the book uses throughout as a tool to reorganize the whole field of decision theory, and in particular to evaluate the extent to which expected utility theories may be normatively too demanding. The second theme is the redefinition strategy that can be used to defend EU theories against the Allais and Ellsberg paradoxes, a strategy (...)
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  5.  69
    The Problem of State-Dependent Utility: A Reappraisal.Jean Baccelli - 2021 - British Journal for the Philosophy of Science 72 (2):617-634.
    State-dependent utility is a problem for the behavioural branch of decision theory under uncertainty. It questions the very possibility that beliefs be revealed by choice data. According to the current literature, all models of beliefs are equally exposed to the problem. Moreover, the problem is solvable only when the decision-maker can influence the resolution of uncertainty. This article gives grounds to reject these two views. The various models of beliefs can be shown to be unequally exposed to the problem of (...)
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  6. Risk Attitudes in Axiomatic Decision Theory: A Conceptual Perspective.Jean Baccelli - 2018 - Theory and Decision 84 (1):61-82.
    In this paper, I examine the decision-theoretic status of risk attitudes. I start by providing evidence showing that the risk attitude concepts do not play a major role in the axiomatic analysis of the classic models of decision-making under risk. This can be interpreted as reflecting the neutrality of these models between the possible risk attitudes. My central claim, however, is that such neutrality needs to be qualified and the axiomatic relevance of risk attitudes needs to be re-evaluated accordingly. Specifically, (...)
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  7.  90
    Beyond the Metrological Viewpoint.Jean Baccelli - 2020 - Studies in History and Philosophy of Science Part A 1:56-61.
    The representational theory of measurement has long been the central paradigm in the philosophy of measurement. Such is not the case anymore, partly under the influence of the critique according to which RTM offers too poor descriptions of the measurement procedures actually followed in science. This can be called the metrological critique of RTM. I claim that the critique is partly irrelevant. This is because, in general, RTM is not in the business of describing measurement procedures, be it in idealized (...)
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  8. Choice-Based Cardinal Utility. A Tribute to Patrick Suppes.Jean Baccelli & Philippe Mongin - 2016 - Journal of Economic Methodology 23 (3):268-288.
    We reexamine some of the classic problems connected with the use of cardinal utility functions in decision theory, and discuss Patrick Suppes's contributions to this field in light of a reinterpretation we propose for these problems. We analytically decompose the doctrine of ordinalism, which only accepts ordinal utility functions, and distinguish between several doctrines of cardinalism, depending on what components of ordinalism they specifically reject. We identify Suppes's doctrine with the major deviation from ordinalism that conceives of utility functions as (...)
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  9.  17
    Expected Utility in 3D.Jean Baccelli - forthcoming - In Reflections on the Foundations of Statistics: Essays in Honor of Teddy Seidenfeld.
    Consider a subjective expected utility preference relation. It is usually held that the representations which this relation admits differ only in one respect, namely, the possible scales for the measurement of utility. In this paper, I discuss the fact that there are, metaphorically speaking, two additional dimensions along which infinitely many more admissible representations can be found. The first additional dimension is that of state-dependence. The second—and, in this context, much lesser-known—additional dimension is that of act-dependence. The simplest implication of (...)
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  10.  45
    Can Redescriptions of Outcomes Salvage the Axioms of Decision Theory?Jean Baccelli & Philippe Mongin - forthcoming - Philosophical Studies:1-28.
    The basic axioms or formal conditions of decision theory, especially the ordering condition put on preferences and the axioms underlying the expected utility formula, are subject to a number of counter-examples, some of which can be endowed with normative value and thus fall within the ambit of a philosophical reflection on practical rationality. Against such counter-examples, a defensive strategy has been developed which consists in redescribing the outcomes of the available options in such a way that the threatened axioms or (...)
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  11.  12
    Risk Aversion Over Finite Domains.Jean Baccelli, Georg Schollmeyer & Christoph Jansen - forthcoming - Theory and Decision.
    We investigate risk attitudes when the underlying domain of payoffs is finite and the payoffs are, in general, not numerical. In such cases, the traditional notions of absolute risk attitudes, that are designed for convex domains of numerical payoffs, are not applicable. We introduce comparative notions of weak and strong risk attitudes that remain applicable. We examine how they are characterized within the rank-dependent utility model, thus including expected utility as a special case. In particular, we characterize strong comparative risk (...)
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  12.  22
    Book Review of Frank Ramsey: A Sheer Excess of Powers by Cheryl Misak. [REVIEW]Jean Baccelli - 2021 - History of Political Economy 53: 949-951.
    A book review of Frank Ramsey: A Sheer Excess of Powers, by Cheryl Misak (OUP, 2020).
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  13. Moral Hazard, the Savage Framework, and State-Dependent Utility.Jean Baccelli - 2021 - Erkenntnis 86 (2):367-387.
    In this paper, I investigate the betting behavior of a decision-maker who can influence the likelihood of the events upon which she is betting. In decision theory, this is best known as a situation of moral hazard. Focusing on a particularly simple case, I sketch the first systematic analysis of moral hazard in the canonical Savage framework. From the results of this analysis, I draw two philosophical conclusions. First, from an observational and a descriptive point of view, there need to (...)
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  14.  30
    Philippe Mongin (1950-2020).Jean Baccelli & Marcus Pivato - 2021 - Theory and Decision 90 (1):1-9.
    An obituary of Philippe Mongin (1950-2020).
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  15.  10
    L’analyse axiomatique et l’attitude par rapport au risque.Jean Baccelli - 2016 - Revue Economique 2 (67):355-366.
    Cette note épistémologique porte sur le statut, en théorie de la décision, des concepts d’attitude par rapport au risque. A première vue, l’analyse axiomatique ne les exploite pas, ce qui reflète une certaine neutralité des modèles de décision au sujet de l’attitude par rapport au risque. Mais un examen plus poussé met en valeur la variation conditionnelle et le renforcement de l’attitude par rapport au risque, qui rattachent les concepts d’attitude par rapport au risque à l’analyse axiomatique.
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  16.  52
    Le comportement et le concept de choix.Jean Baccelli - 2013 - Dialogue 52 (1):43-60.
    This note considers the conceptual part of Sen’s «Internal Consistency of Choice». Amongst the various claims this paper features, two are singled out. A first, negative, claim is that no formal condition of choice consistency is normatively compelling without exception. A second, positive, claim, is that a formal condition of choice consistency is normatively compelling only under some assumptions involving preference. Here, the puzzling choices Sen puts forward are scrutinized and it is argued that such a scrutiny leads to question (...)
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