Toulouse 1 Capitole Publications
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    Les relations complexes de l’appropriation et de l’apprentissage, le cas des avis de salariés

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    L’appropriation d’un dispositif est non seulement une question technique, mais aussi sociale, politique, culturelle… Les plateformes d’avis de salariés sont un bon exemple de ce principe. Elles existent en France depuis 2008, et cette histoire longue montre une appropriation complexe par de multiple sacteurs. L’analyse met en évidence un processus évolutif qui n’enferme pas le dispositif et son usager dans une relation strictement individuelle, isolée d’un contexte. Par l’approche sociotechnique soutenue dans cet article est questionné l’apprentissage : que doit-on enseigner pour que des apprentissages pertinents puissent se construire ? Des choix opposés se centreraient sur la technique ou le social, l’un excluant l’autre. Selon l’auteur, il s’agit plutôt de lier ces deux dimensions, considérant que toute technologie est sociale. Apprendre les usages des plateformes d’avis de salariés est alors une façon d’apprendre une partie des logiques sociales de notre monde

    A peace baby boom? Evidence from Colombia’s peace agreement

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    Violence affects households’ preferences, perceptions and constraints regarding fertility choices. What happens when violence ends? Using administrative data from Colombia, we find that the end of a long internal conflict differentially increased fertility by 2.6 percent in areas exposed to violence. The effect is present across all reproductive ages and larger in municipalities with higher levels of violence exposure at baseline. It is not driven by heath supply indicators, by the mortality of newborns and infants or by differential migration. We interpret this evidence as consistent with an increased optimism to raise children in a better and safer environment

    Optimal pooling and distributed inference for the tail index and extreme quantiles

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    This paper investigates pooling strategies for tail index and extreme quantile estimation from heavy-tailed data. To fully exploit the information contained in several samples, we present general weighted pooled Hill estimators of the tail index and weighted pooled Weissman estimators of extreme quantiles calculated through a nonstandard geometric averaging scheme. We develop their large-sample asymptotic theory across a fixed number of samples, covering the general framework of heterogeneous sample sizes with di↵erent and asymptotically dependent distributions. Our results include optimal choices of pooling weights based on asymptotic variance and MSE minimization. In the important application of distributed inference, we prove that the variance-optimal distributed estimators are asymptotically equivalent to the benchmark Hill and Weissman estimators based on the unfeasible combination of subsamples, while the AMSE-optimal distributed estimators enjoy a smaller AMSE than the benchmarks in the case of large bias. We consider additional scenarios where the number of subsamples grows with the total sample size and e↵ective subsample sizes can be low. We extend our methodology to handle serial dependence and the presence of covariates. Simulations confirm the statistical inferential theory of our pooled estimators. Two applications to real weather and insurance data are showcased

    Plus-values immobilières (Note s/s CE 26 janv. 2021, n° 429576)

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    Note inclue dans la chronique n°155 : Fiscalité des revenus et du patrimoine : chronique de l'année 2021 Le Conseil d'État, le 26 janvier 2021, s'est prononcé pour la première fois sur l'application de l'abattement forfaitaire prévu à l'article 150 VF III du CGI

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