In an empirical analysis, considering 236 U.S. cities in the period 1980-1990, we document a strong positive … productivity of those factors which are locally abundant. Therefore we may interpret this regularity as a sign that in cities where … may provide an explanation for the behaviour of education premia across cities. …

cities between 1970 and 1990. …

our approach at the city-level using US Census data on individuals in 173 cities for 1970, 1980, and 1990. Estimation …

our approach at the city-level using US Census data on individuals in 173 cities for 1970, 1980, and 1990. Estimation …

cities between 1970 and 1990. …

human capital and human capital externalities in cities. Our estimates imply that a one year increase in average schooling … in cities increases their aggregate labour productivity by 8 to 11%. We find no evidence for aggregate human capital … externalities in cities however, although we use three different approaches. Our main theoretical contribution is to show how human …

-schooling externalities in US cities between 1970 and 1990. …

cities between 1970 and 1990. …

Two large but separate bodies of literature analyze the economic effects of international trade and immigration. Given … that several factors are important determinants of both trade and migration flows, the previous studies are vulnerable to a … potentially serious omitted-variables bias, questioning the validity of existing estimates of the effects of trade and immigration …