differences in labor mobility and reallocation costs, which are typically ignored in American "International Trade" textbooks … human capital investments: they are not independent of the aggregate state of labor markets, and in particular, frictions … and slackness of the labor market raises the returns to specific human capital investments relative to general capital …

labor market states. In steady-state, we hence have a theory of equilibrium unemployment determined by both matching … labor force and rises the share of attached workers. Finally, our theory suggests that contrary to two-state models … frictions and labor market participation margins. The paper firstly rationalizes and quantitatively accounts for the existence …