Job Polarization and Jobless Recoveries
研究了就业极化（中等技能常规职业就业份额下降）与无就业复苏（衰退后就业缓慢反弹）之间的关系，发现常规职业的就业损失几乎全部发生在经济衰退期，且总体无就业复苏可由正在消失的常规职业的无就业复苏解释。
Job polarization refers to the shrinking share of employment in middle-skill, routine occupations experienced over the past 35 years. Jobless recoveries refers to the slow rebound in aggregate employment following recent recessions despite recoveries in aggregate output. We show how these two phenomena are related. First, essentially all employment loss in routine occupations occurs in economic downturns. Second, jobless recoveries in the aggregate can be accounted for by jobless recoveries in the routine occupations that are disappearing.