Recherche avancée

Olivier Faugeras

vol. 54, n° 5, 2025, p. 121–159

Motivated by finding a way to deal with Compositional Data (CoDa) with or without zeroes in a unified way, we build upon the previous projective geometry viewpoint of Faugeras (2023) and use the tools provided by the exterior product and Grassmann’s algebra. These allow to represent higher...

Matthieu Bouvard, Bruno Jullien et David Martimort

n° 25-1667, 2025

Catherine Molho et Linh Vu

vol. 66, n° 102107, décembre 2025

Altruistic decisions are central to civic engagement and humanitarian efforts. However, altruistic behavior is often context-dependent rather than consistent—the same individuals who act generously in one situation may behave selfishly in another. Here, we review research on this phenomenon, which...

Jean Tirole

sous la direction de Subramanian Rangan, Oxford University Press, partie I, chapitre 2, 2025, p. 59–70

Any scientific discipline—any theory, formal or informal—rests on assumptions. These assumptions matter, and in the case of social sciences, they influence our vision of society and our policy recommendations. This chapter reviews and comments on assumptions most commonly made by economists—...

Eran Shmaya et Bruno Ziliotto

vol. 63, n° 3, 2025

We consider a mean-field game model in which the cost functions depend on a fixed parameter referred to as the “state,” which remains unknown to the players. Players acquire information about the state through private signals received during the course of the game. We derive a mean-field system...

André Grimaud et Luc Rougé

vol. 29, n° e98, 2025, révision 10 juin 2026, p. 1–30

Technical progress is considered a key element in the fight against climate change. It may take the form of technological breakthroughs, that is, shocks that induce significant leaps in the stock of knowledge. We use an endogenous growth framework with directed technical change to analyze the...

Christophe Courbage, Richard Peter, Béatrice Rey et Nicolas Treich

sous la direction de Georges Dionne, 3ème edition, Springer Cham, 2025

This chapter surveys the economic literature on prevention and precaution. Prevention refers to costly activities that mitigate risk. Prevention encompasses self-protection, an investment to reduce the probability of loss, and self-insurance, an investment to reduce the severity of loss. Precaution...

Benjamin Ouvrard, Arnaud Reynaud et Murudaiah Sivamurthy

vol. 11, n° 1, 2025

Using an experimental setting inspired by the empirical social choice literature, we analyze how Indian farmers define fair water allocation. We investigate the choices of 240 Indian farmers who — as a neutral third-party — are asked to make water allocation decisions in situations that differ,...

Ahmed Ezzeldin Mohamed

vol. 69, n° 4, 2025, p. 731–760

Autocratic elections are often marred with systematic intimidation and violence towards voters and candidates. When do authoritarian regimes resort to violent electoral strategies? I argue that electoral violence acts as a risk-management strategy in competitive authoritarian elections where: (a)...

Zohra Bouamra-Mechemache, Olivier de Mouzon, Valérie Orozco, Lola Pedrini et Marine Spiteri

vol. 99, 2025, p. 220–234

Dans le cadre d'une transition alimentaire vers plus de protéines végétales, nous étudions l'évolution des achats de produits contenant des légumineuses en France. De 2009 à 2019, la consommation de légumineuses hors soja a augmenté de 25 %, mais reste largement inférieure aux recommandations....