Estimating the Union Earnings Effect Using a Sample of Displaced Workers
利用工厂倒闭失业工人数据，减少工会状态测量误差，发现工会对收入的影响在纵向与横截面估计中相近，且不同技能工人存在不同的选择偏差。
This paper improves on past longitudinal estimates of the union earnings effect by using a sample of workers for whom the error in measuring changes in union status is minimized. The author uses a sample of workers displaced by plant closings from the 1994 and 1996 Current Population Survey Displaced Workers Supplement files to estimate the effects of union membership on weekly earnings. When models are estimated using the entire sample of displaced workers, longitudinal estimates of the union earnings effect are quite similar in magnitude to estimates from cross-sectional regressions. In models estimated separately by skill group, the author finds some evidence of positive selection into unions among workers with low observed skills and negative selection into unions among workers with high observed skills.