This paper explores the implications of Uni.ed Growth Theory for the origins of existing di¤erences in income per capita across countries. The theory sheds light on three fundamental layers of comparative development. It identi.es the factors that have governed the pace of the transitionfrom...

This study explores the consequences and origins of contemporary differences in well-being across ethnic groups within countries. We construct measures of ethnic inequality combining ethnolinguistic maps on the spatial distribution of groups with satellite images of light density at night....