This paper investigates the causal influence of export concentration on measures of aggregate volatility. Geographically disadvantaged countries often have a concentrated export structure which makes them more vulnerable to external shocks. Identifying causal effects of export concentration on...

The authors examine the influence of infrastructure, institutional quality, colonial and geographic context, and trade preferences on the pattern of bilateral trade. They are interested in threshold effects, and so emphasize those cases where bilateral country pairs do not actually trade. The...