There is considerable disagreement in the empirical macro literature as to the degree of returns to scale in U.S. production. While many studies find evidence of a small degree of increasing returns, standard errors are typically large. This issue is of importance for assessing the possibility...

Recent research shows that observed labor market flows can be explained in search and matching models only by assuming either implausibly large productivity shocks (Hall 2003) or an excessively high degree of real wage rigidity even for new hires (Shimer 2003). If this is not the case, the...