The Persistent Effect of Temporary Affirmative Action
研究发现联邦平权法案监管使企业黑人雇员比例在5年内平均上升0.8个百分点，且监管取消后该比例仍以相似速度增长，部分原因是企业改进了招聘筛选方法。
I estimate the dynamic effects of federal affirmative action regulation, exploiting variation in the timing of regulation and deregulation across work establishments. Affirmative action increases the black share of employees over time: in 5 years after an establishment is first regulated, the black share of employees increases by an average of 0.8 percentage points. Strikingly, the black share continues to grow at a similar pace even after an establishment is deregulated. I argue that this persistence is driven in part by affirmative action inducing employers to improve their methods for screening potential hires.