Abstract:
A general-equilibrium shopping-time model of money demand is used to obtain estimates of some dynamic costs of inflation under alternative monetary policy rules. After examining the welfare implications of steady-state inflation, dynamic welfare costs are evaluated for inflation-targeting and price-level targeting regimes in a stochastic setting in which agents are uncertain about the underlying inflation trend. The regimes are distinguished by the presence or absence of a unit root in the money supply and the price level. Uncertainty about the underlying inflation rate is introduced as a mechanism for modeling the role of policy credibility.