In a world where rational individuals may hold different prior beliefs, a sender can influence the behavior of a receiver by controlling the informativeness of a signal. We characterize the set of distributions of posterior beliefs that can be induced by a signal, and provide necessary and...

In a symmetric information voting model, an individual (information controller) can influence voters’ choices by designing the information content of a public signal. We characterize the controller’s optimal signal. With a non-unanimous voting rule, she exploits voters’ heterogeneity by...

A sender can influence the behavior of a receiver by controlling the informativeness of a public signal. We show that the sender cannot benefit from becoming an expert, that is, from privately learning some information about the state. We then show that in some instances an uninformed sender is...