Since the early 1980s, the United States economy has changed in some important ways: Inflation now rises considerably less when unemployment falls and the volatility of output and inflation have fallen sharply. This paper examines whether changes in monetary policy can account for these...

New Keynesian models with sticky prices and rational expectations have a difficult time explaining why reducing inflation usually requires a recession. An explanation for the costliness of reducing inflation is that inflation expectations are less than perfectly rational. To explore this...

The paper assesses, using seven structural models used heavily by policymaking institutions, the effectiveness of temporary fiscal stimulus. Models can, more easily than empirical studies, account for differences between fiscal instruments, for differences between structural characteristics of...