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 22, 2026 (room Pierre Grisvard): 

Inga DEIMEIN (University of Arizona)

Title: Informed Delegation and Communication (with Dimitri Migrow).

Abstract: We compare delegation and communication outcomes in an organization with two-sided private information. The principal observes the context--which of two (correlated) projects is relevant--while the agent observes the contents, the realizations of the two projects. Principal and agent have perfectly aligned interests in one of the projects, but only partially aligned interests in the other. They can share their information via cheap talk communication. The principal can choose between two organizational structures: (1) retaining authority to make the decision and (2) delegating this authority to the agent; this choice is made either before learning the context ("uninformed delegation'') or after ("informed delegation"). We characterize three regions in the conflict-correlation space: (1) delegation is optimal for low (possible) conflict, (2) retaining authority and babbling about the context is optimal for larger conflict and high correlation, and (3) retaining authority and truthful revelation of the context is optimal otherwise. Uninformed delegation serves as commitment device, while informed delegation serves as signaling device.

Organizers

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

Maël Le Treust  (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