The Federal Reserve allowed unemployment to fall substantially in the late 1990s, to a level well below earlier estimates of the NAIRU, without a corresponding tightening of monetary policy. In addition, Meyer (1999) has suggested that episodes of heightened uncertainty about the NAIRU may...

We examine the performance and robustness properties of monetary policy rules in an estimated macroeconomic model in which the economy undergoes structural change and where private agents and the central bank possess imperfect knowledge about the true structure of the economy. Policymakers...