Declining Worker Turnover: The Role of Short-Duration Employment Spells
利用季度劳动力指标数据库，研究发现过去二十年劳动力市场流动率下降主要源于仅持续一两个季度的短期就业岗位减少，且这一现象普遍存在于各行业、企业规模和人口群体中。
Using the Quarterly Workforce Indicators database, we document that a significant amount of the decline in labor market turnover during the last two decades is accounted for by the decline in employment spells that last just one or two quarters. This phenomenon is pervasive: short-term employment spells have declined across industries, firm size categories, demographic groups, and geographic regions. Using a search-and-matching model in the Diamond-Mortensen-Pissarides tradition that incorporates noisy signals about the quality of a worker-firm match, we argue that improved screening by workers and firms can account for much of the decline in short-lived employment spells.