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 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...