Toulouse 1 Capitole Publications
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    Advances in Contemporary Statistics and Econometrics : Festschrift in Honor of Christine Thomas-Agnan

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    Stochastic approximation algorithms for superquantiles estimation

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    Not by transmission alone: the role of invention in cultural evolution

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    Innovation—the combination of invention and social learning—can empower species to invade new niches via cultural adaptation. Social learning has typically been regarded as the fundamental driver for the emergence of traditions and thus culture. Consequently, invention has been relatively understudied outside the human lineage—despite being the source of new traditions. This neglect leaves basic questions unanswered: what factors promote the creation of new ideas and practices? What affects their spread or loss? We critically review the existing literature, focusing on four levels of investigation: traits (what sorts of behaviours are easiest to invent?), individuals (what factors make some individuals more likely to be inventors?), ecological contexts (what aspects of the environment make invention or transmission more likely?), and populations (what features of relationships and societies promote the rise and spread of new inventions?). We aim to inspire new research by highlighting theoretical and empirical gaps in the study of innovation, focusing primarily on inventions in non-humans. Understanding the role of invention and innovation in the history of life requires a well-developed theoretical framework (which embraces cognitive processes) and a taxonomically broad, cross-species dataset that explicitly investigates inventions and their transmission. We outline such an agenda here

    Risk Quantization by Magnitude and Propensity

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    We propose a novel approach in the assessment of a random risk variable X by introducing magnitude-propensity risk measures (mX; pX). This bivariate measure intends to account for the dual aspect of risk, where the magnitudes x of X tell how hign are the losses incurred, whereas the probabilities P(X = x) reveal how often one has to expect to suffer such losses. The basic idea is to simultaneously quantify both the severity mX and the propensity pX of the real-valued risk X. This is to be contrasted with traditional univariate risk measures, like VaR or Expected shortfall, which typically conflate both effects. In its simplest form, (mX; pX) is obtained by mass transportation in Wasserstein metric of the law PX of X to a two-points f0;mXg discrete distribution with mass pX at mX. The approach can also be formulated as a constrained optimal quantization problem. This allows for an informative comparison of risks on both the magnitude and propensity scales. Several examples illustratethe proposed approach

    Agriculture et environnement, duel épique sinon duo fertile.

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    Note bibliographique sur "Production agricole et droit de l'environnement", C. Hermon, I. Doussan, B. Grimonprez (dir.), LexisNexis, 2e éd, 2020, 523 p

    En droit pénal, un fou est et demeure un fou

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    Les dispositions de l’article 122-1, alinéa 1er, du Code pénal, qui précisent que « n’est pas pénalement responsable la personne qui était atteinte, au moment des faits, d’un trouble psychique ou neuropsychique ayant aboli son discernement ou le contrôle de ses actes », ne distinguent pas selon l’origine du trouble ayant conduit à cette abolition. Doit donc être considérée comme irresponsable pénalement la personne qui a agi sous l’empire d’une bouffée délirante notamment causée par une consommation volontaire et régulière de produits stupéfiants

    Pas de journaliste durant un contrôle de police judiciaire

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    Pas de journaliste durant un contrôle de police judiciaire : commentaire de Cass. crim., 9 mars 2021, n° 20-83.304

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