Data on the average income of a resident of Ecuador is easy to find. But until now there has been no data on the average income of a person born in Ecuador, regardless of where she or he lives. In this paper, research fellow Michael Clemens and non-resident fellow Lant Pritchett introduce a new dataset, income per natural: the mean annual income of persons born in a given country regardless of residence. Turns out that defining things this way makes a big difference, and not just for tiny nations. Income per natural differs by more than 10% from income per resident for dozens of countries including Vietnam, Kenya and Morocco. In other words, one of the largest sources of increased income for people in many parts of the developing world is moving to another country.
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