We find that changes in hours volatilities since the mid-1980s have been more favorable for middle-skilled workers relative to high-skilled and low-skilled workers. In particular, the relative standard deviation of detrended employment of middle-skilled workers to high-skilled workers has...

We study the impact of skilled immigrants on the employment structures of U.S. firms using matched employer-employee data. Unlike most previous work, we use the firm as the lens of analysis to account for a greater level of heterogeneity and the fact that many skilled immigrant admissions are...

Firms play a central role in the selection, sponsorship, and employment of skilled immigrants entering the United States for work through programs like the H-1B visa. This role has not been widely recognized in the literature, and the data to better understand it have only recently become...

We identify a key role of factor supply, driven by demographic changes, in shaping several empirical regularities that are a focus of active research in macro and labor economics. In particular, the large movements of the return to experience over the last four decades are almost perfectly...