Recherche avancée

Benoît Chevalier-Roignant et Stéphane Villeneuve

n° 26-1702, janvier 2026

We study the effect of upstream competition and supply shocks on a buyer’s investment decisions, under demand uncertainty. Imperfect upstream competition leads to double marginalization. This effect is mitigated if the supplier pool is larger (when production costs are linear or in case of...

Koen Jochmans

n° 26-1701, janvier 2026

Inference procedures for dyadic data based on two-way clustering rely on the data being exchangeable and dissociated. In particular, observations must be independent if they have no index in common. In an effort to relax this we consider, instead, data where Yij and Ypq can be dependent for all...

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,...