Evidence of Changes in Employment, Labor Force Participation, and Unemployment FINIS WELCH
LABOR FORCE PARTICIPATION, AND UNEM PLOYMENT
There are too many empirical studies to do justice even to those I do know. I essentially ignore earlier work, which was surveyed in a study by John Peterson and Charles Stewart and in a paper by Hyman Kaitz.1 Many of the studies they discuss were excellent in their own time, but they have been supplanted by more recent evidence. My dis cussion is limited to studies of national impact and to those I feel have contributed significantly either to the measurement of the effects as we now understand them or to the current debate. Many are omitted here because I consider them too poorly specified to convey important in formation. Others are omitted because effects are limited to a single industry or area.