The Decline of Short Duration Employment Spells

Using the Quarterly Workforce Indicators, 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 less than a quarter. Using a search and matching model that incorporates noisy signals about the quality of a worker-firm match, we show that improved candidate screening by firms can account for the decline in short-lived employment spells. Quantitative exercises show that this explanation can account for the observed changes in various labor market outcomes, whereas alternative potential explanations, such as increased hiring costs, cannot.