Three notions of optimal monetary policy are applied to a model in which firms set their prices for multiple periods. The best steady state inflation rate is slightly positive, but the policy that maximizes present discounted welfare leads in the long run to zero inflation. If commitment is not...

The analysis in Ball and Romer [1991] suggests that models with fixed costs of changing price may be rife with multiple equilibria; in their static model price adjustment is always characterized by strategic complementarity, a necessary condition for multiplicity. We extend Ball and Romer's...

The nature of price dynamics has long been thought important for the origin and duration of business cycles. To investigate this topic, we construct a dynamic stochastic general equilibrium macroeconomic model in which monopolistically competitive firms face fixed costs of changing the nominal...