Séminaire Microéconomie : Tous les mercredis
Heure : 12h15 – 13h30
Date : 19/11/2025
Salle : 3001

Frederic KOESSLER (HEC) – “A belief-based approach to signaling (with Marie Laclau and Tristan Tomala”

CV : We provide a geometric characterization of the set of interim equilibrium payoffs in the general class of costly signaling games. Our characterization offers a unified, belief-based framework to study both cheap talk and costly signaling, with or without transparent motives. The key ingredient is the analysis of Bayes-plausible belief distributions and signal-contingent interim values that are incentive-compatible for the sender. Geometrically, this leads to a constrained convexification of the graphs of the interim value correspondences. We apply and illustrate the results in a class of intimidation games. We also derive the sender’s best equilibrium payoff under transparent motives. Finally, we compare the equilibrium outcomes to those arising when the sender can commit to a signaling strategy.

Organisateurs :

Julien COMBE (Pôle d’Economie du CREST)
​​​​​​​​​​​​Yves Le YAOUANQ (Pôle d’Economie du CREST)
​​​​​​​​​Matias NUNEZ (Pôle d’Economie du CREST)

Commanditaires :
CREST