African societies exported more slaves in colder years. Lower temperatures reduced mortality and raised agricultural yields, lowering slave supply costs. Our results help explain African participation in the slave trade, which predicts adverse outcomes today. We use an annual panel of African...

African societies exported more slaves in colder years. Lower temperatures reduced mortality and raised agricultural yields, lowering the cost of supplying slaves. Our results help explain African participation in the slave trade, which is associated with adverse outcomes today. We merge annual...

Nigeria's Benin region was a major rubber producer in 1960. In 1921, however, the government abandoned the industry as a failure. I explain why rubber did not take hold before 1921. British conquest was motivated in part by the region's wild rubber resources. The government was unable to protect...

In this review, I discuss the role of African institutions in general and pre-colonial institutions in particular in explaining present-day African poverty. Six of the most often cited explanations of African poverty -- geography, ethnolinguistic fractionalization, the slave trades, colonial...