low-wage earners worked more than highwage earners in 1970, the opposite was true in 2000. We show that a parsimonious … in the college education rate between 1967 and 2000 as well as the trend in the wage-hours correlation. Moreover, we show …

of capital (or an increase in capital productivity) causes employment and wage polarization. Specifically, further … reduce the real wage of workers with comparative advantage profiles close to that of capital. We show that large enough … automation - thereafter inducing monotone increases in skill premia rather than wage polarization. …