We show that equilibrium matching models imply that standard estimates of the matching function elasticities are exposed to an endogeneity bias, which arises from the search behavior of agents on either side of the market. We offer an estimation method which, under certain structural assumptions about the process driving shocks to matching efficiency, is immune from that bias. Application of our method to the estimation of a basic version of the matching function using aggregate U.S. data from the Job Openings and Labor Turnover Survey (JOLTS) suggests that the bias can be quantitatively important.

We document that fluctuations in part-time employment play a major role in movements in hours per worker during cyclical swings in the labor market. Building on this result, we develop a stock-flow framework to describe the dynamics of part-time employment. The evolution of part-time employment is predominantly explained by cyclical changes in transitions between full-time and part-time employment. Those transitions occur overwhelmingly at the same employer, entail sizable changes in individual working hours and are associated with an increase in involuntary part-time work. Our findings provide a novel understanding of the cyclical dynamics of labor adjustment on the intensive margin. (JEL E24, E32, J22, J23)

We document a new fact about the cyclical behavior of aggregate hours. Using microdata for the US and the UK, we show that changes in hours per worker are driven by fluctuations in part-time employment, which are in turn explained by the cyclical behavior of transitions between full-time and part-time jobs. This reallocation occurs almost exclusively within firms and entails large changes in employees' schedules of working hours. These patterns are consistent with the view that employers adjust the hours of their employees in response to shocks, and they partly account for the poor recovery that followed the Great Recession.

Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. www.econstor.eu In the US labor market the average black worker is exposed to a lower employment rate and earns a lower wage compared to his white counterpart. Lang and Lehmann (2012) argue that these mean differences mask substantial heterogeneity along the distribution of workers' skill. Terms of use: Documents in D I S C U S S I O N P A P E R S E R I E SIn particular, they argue that black-white wage and employment gaps are smaller for highskill workers. In this paper we show that a model of employer taste-based discrimination in a labor market characterized by search frictions and skill complementarities in production can replicate these regularities. We estimate the model with US data using methods of indirect inference. Our quantitative results portray the degree of employer prejudice in the US labor market as being strong and widespread, and provide evidence of an important skill gap between black and white workers. We use the model to undertake a structural decomposition and conclude that discrimination resulting from employer prejudice is quantitatively more important than skill differences to explain wage and employment gaps. In the final section of the paper we conduct a number of counterfactual experiments to assess the effectiveness of different policy approaches aimed at reducing racial differences in labor market outcomes.JEL Classification: J31, J64, J71