We re-examine the long-run geographical development of U.S. manufacturing industries using recent advances in spatial concentration measures. We construct spatially-weighted indices of the geographical concentration of U.S. manufacturing industries during the period 1880 to 1997 using data from...

This paper adopts multilevel analysis to analyze the agglomeration-performance nexus for domestic firms in Sub-Saharan Africa. We show that contextual factors such as country, city and industry together explain up to 30% of the variance in firms' productivity. Our results show also that African...