Conference announcement: 30 Years of Game Theory at Institut Henri Poincaré, October 06-10, 2025, Paris.

Welcome

The Séminaire parisien de Théorie des Jeux is an open, inter-institutional, multi-disciplined seminar which covers all fields of game theory. It takes place on Monday from 11:00 to 12:00 am at Institut Henri Poincaré, 11 rue Pierre et Marie Curie, Paris 5ème. MAP

You will find the program for the current academic year on the page 2025/2026 and the program for past years on the page Archives.

The junior seminar welcomes PhD students in game theory to present their work.  You will find the program for the current academic year on the page Junior Seminar 2025/2026.

Next seminar:  

June 1, 2026 (room Pierre Grisvard): 

Nabil AL NAJJAR (Northwestern University)

Title: Rational Disagreement (with Harald Uhlig)

Abstract:  We propose rational disagreement as a framework for analyzing seemingly irrational behavior that can persist despite the wide availability of objective information in a steady-state. Agents are rational in that they correctly anticipate the distribution of aggregate outcomes, yet disagree about which specific individuals perform better than others. We show how unordered individual outcome distributions can be identified solely from aggregate statistics. We then characterize the resulting game, define its Nash equilibria, and develop a statistical test for the null hypothesis of agreement. Finally, we situate our framework within the broader literature on Bayesian games, behavioral biases, and the rational expectations hypothesis.

Organizers

Frédéric Koessler (CNRS, HEC Paris), frederic.koessler[at]gmail[dot]com

Maël Letreust  (CNRS,  IRISA Rennes), mael.le-treust[at]cnrs[dot]fr

Chantal Marlats (LEMMA, Université Paris Panthéon-Assas), chantal.marlats[at]u-paris2[dot]fr

Yannick Viossat (CEREMADE, PSL), viossat[at]ceremade[dot]dauphine[dot]fr

To join (or unsuscribe from) our mailing list, please contact Maël Le Treust at mael.le-treust[at]cnrs[dot]fr. 

Former organizers

Joseph Abdou; Bernard De Meyer; Françoise Forges; Olivier Gossner;  Marie Laclau; Rida Laraki; Lucie Ménager; Vianney Perchet; Jérôme Renault; Dinah Rosenberg; Sylvain Sorin; Tristan Tomala; Xavier Venel; Nicolas Vieille; Guillaume Vigeral; Bruno Ziliotto