Robust Information Transmission
American Economic Review: Insights
no. 1, March 2023
This paper investigates robust information transmission between a sender and a receiver in the Crawford and Sobel (1982) model. We characterize behavior that remains equilibrium behavior independently of the form of a small communication cost. Under standard conditions, we find that an equilibrium outcome is robust if and only if it features a maximal number of on-path actions and each is induced by a single message. The result extends regardless of the direction of the bias, the number of available messages, or whether the objectives of the sender and the receiver are aligned.
"Robust Information Transmission."
American Economic Review: Insights,
Asymmetric and Private Information; Mechanism Design
Search; Learning; Information and Knowledge; Communication; Belief; Unawareness