Upskilling: Do Employers Demand Greater Skill When Workers Are Plentiful?
利用在线招聘数据，研究发现大衰退期间教育和工作经验要求提高，且劳动力供给增加越大的州和职业，要求提升越多，这解释了2007-2010年间技能要求上升的18%至25%。
Using a proprietary database of online job postings, we find that education and experience requirements rose during the Great Recession. These increases were larger in states and occupations that experienced greater increases in the supply of available workers. This finding is robust to controlling for local demand conditions and firm [Formula: see text] job-title fixed effects and using a natural experiment arising from troop withdrawals as an exogenous shock to labor supply. Our results imply that the increase in unemployed workers during the Great Recession can account for 18% to 25% of the increase in skill requirements between 2007 and 2010.