Optimal monetary policy maximizes the welfare of a representative agent, given frictions in the economic environment. Constructing a model with two broad sets of frictions — costly price adjustment by imperfectly competitive firms and costly exchange of wealth for goods — we find optimal...

The authors investigate an international monetary business-cycle model in which agents face monetary policy processes that incorporate regime shifts. In any given period agents cannot directly observe the policy regime, but instead form beliefs that are updated via Bayesian learning. As a...