In state-of-the-art macroeconomic and labor market models shocks are assumed to be homoscedastic. However, we show that this assumption is much too restrictive. We estimate the conditional variance-covariance matrix using a VAR-DCC model and discuss the time-varying risk contained in a large set...

Although immigration reform has proved elusive for more than forty years, presidents from both parties have issued crucial executive actions that regulate inflows of new immigrants and the status of those already in the US. We focus on a particular class of executive actions, those related to...

This paper estimates whether learning-by-doing effects or cleansing effects of recessions drive the endogenous component of productivity in the United States. Using Bayesian estimation techniques we find that external and internal learning-by-doing effects dominate. We find no evidence for...