We construct a matrix showing the share of the year 2000 population in every country that is descended from people in different source countries in the year 1500. Using this matrix, we analyze how post-1500 migration has influenced the level of GDP per capita and within-country income inequality...

We revisit the idea that colonized countries that were more (less) economically advanced in 1500 became poorer (richer, respectively) by the late 20th century. Using data on place of origin of today's country populations and the urbanization and population density measures used by Acemoglu et...

What became the post-War era's "less developed countries" (LDCs) varied enormously in their pre- modern or pre-industrial economic conditions. We hypothesize that if these countries are arrayed on a continuum of pre-industrial development such as that of the demographer Ester Boserup, countries...