The natural rate of unemployment changes over time as a result of structural shifts in the distribution of employment across sectors. This paper develops a Kalman filtering approach to measuring these structural shifts or turbulence. The technique is useful in distinguishing those changes in...

In judging the degree of slack in the economy, policymakers must determine the origin of any increase in the unemployment rate—specifically, how much of it is due to a cyclical slowdown (driven by the broader economy) as opposed to a structural realignment in production (driven by a shift in...