In the last decade, and especially in the course of the recent global economic slowdown, the gap between southern and northern industry has widened. Industrial investment and employment decreased more sharply in the South than in the rest of Italy, and the contribution of the southern regions to...

We model an environment in which different vintages of capital with their different productivities coexist. A reduction in the cost of investment induces investment in new capital which raises both measured capital and measured productivity simultaneously. We calibrate this model to...

College attainment differs nearly two-fold across U.S. states. This paper shows that highly educated states employ skill-biased technologies, specialize in skill-intensive industries, but do not pay lower skill premia. A theory based on agglomeration economies is developed to account for these...