Financial markets and macroeconomic environments are often characterized by positive externalities. In these environments, transparency may reduce expected welfare from an ex-ante point of view: public announcements serve as a focal point for higher-order beliefs and affect agents' behaviour...

In a setting with dispersed information, monopolistic competition and sticky-prices, a policy authority uncertain about the monetary transmission mechanism reacts prudently to supply shocks. This induces producers to ascribe an excessive importance to their private information when setting...