We present a theory of ethnic conflict in which coalitions formed along ethnic lines compete for the economy's resources. The role of ethnicity is to enforce coalition membership: in ethnically homogeneous societies members of the losing coalition can defect to the winners at low cost, and this...

We use data on imports of computer equipment for a large sample of countries between 1970-90 to investigate the determinants of computer-technology adoption. We find strong evidence that computer adoption is associated with higher levels of human capital and with manufacturing trade openness...

We present a joint study of the US structural transformation (the decline of agriculture as the dominating sector) and regional convergence (of Southern to Northern average wages). We find that empirically most of the regional convergence is attributable to the structural transformation: the...

We define a country's technology as a triple of efficiencies: one for unskilled labour, one for skilled labour, and one for capital. We find a negative cross-country correlation between the efficiency of unskilled labour and the efficiencies of skilled labour and capital. We interpret this...