Recherche avancée

Farid Gasmi, Dorgyles Kouakou, Samantha Metevier et Paul Noumba Um

n° 26-1700, janvier 2026

The emigration of highly educated and skilled individuals from low- and middle- to high-income countries has often been synonymous with human capital losses for the countries of origin, a phenomenon known as "brain drain" (Bhagwati and Hamada, 1974). However, under some conditions, these losses can...

Jérôme Bolte, Edouard Pauwels et Quoc Tung Le

vol. 215, janvier 2026, p. 539–574

We first show a simple but striking result in bilevel optimization: unconstrained smooth bilevel programming is as hard as general extended-real-valued lower semicontinuous minimization. We then proceed to a worst-case analysis of box-constrained bilevel polynomial optimization. We show in...

Jean-Paul Azam

n° 26-1698, janvier 2026

This chapter tries to bridge the gap between peace and conflict theory, on the one hand, and the practice of professional Peacebuilders in post-conflicts settings, on the other hand. It first highlights some of the main insights brought about by the theorists, linking the latter to standard...

Nhat-Thang Le et Laurent Miclo

vol. 191, n° 104780, janvier 2026

Consider the global optimisation of a function defined on a finite set endowed with an irreducible and reversible Markov generator. By integration, we extend to the set of probability distributions on and we penalize it with a time-dependent generalized entropy functional. Endowing with a Maas’...

Aurore Archimbaud

vol. 211, n° 105520, janvier 2026

Invariant coordinate selection is an unsupervised multivariate data transformation useful in many contexts such as outlier detection or clustering. It is based on the simultaneous diagonalization of two affine equivariant and positive definite scatter matrices. Its classical implementation relies...

Marie-Françoise Calmette

n° 449, janvier 2026

Frédéric Cherbonnier, Christian Gollier et Aude Pommeret

n° 26-1697, janvier 2026

Standard evaluations of public policies involve discounting the flow of expected net benefits at a unique discount rate. Consequently, they systematically ignore the insurance benefits of policies that hedge the aggregate risk, and the social cost of projects that raise the aggregate risk....

Jacopo Bregolin, Astrid Hopfensitz et Elena Panova

n° 26-1696, janvier 2026

We experimentally test how the content of advice, namely, its alignment with common priors, influences beliefs about its quality and future demand for it. We reject the theoretical hypothesis that demand for advice can be increased by giving advice in alignment with common priors. We find,...

Camille Mondon, Thi-Huong Trinh, Anne M. Ruiz et Christine Thomas-Agnan

vol. 211, n° 105522, janvier 2026

Invariant coordinate selection (ICS) is a dimension reduction method, used as a preliminary step for clustering and outlier detection. It has been primarily applied to multivariate data. This work introduces a coordinate-free definition of ICS in an abstract Euclidean space and extends the method...

Colombe Becquart, Aurore Archimbaud, Anne M. Ruiz, Luka Prilc et Klaus Nordhausen

vol. 211, n° 105521, janvier 2026

Invariant Coordinate Selection (ICS) is a multivariate technique that relies on the simultaneous diagonalization of two scatter matrices. It serves various purposes, including its use as a dimension reduction tool prior to clustering or outlier detection. ICS’s theoretical foundation establishes...