"Data from the NLSY show that more than a quarter of all younger men experience some period of self-employment. Many of them return to wage work. This paper analyzes a simple model of job search and self-employment where self-employment provides an alternative source of income for unemployed...

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...