This research advances the hypothesis that cross-country variation in the historical incidence of eye disease has influenced the current global distribution of per capita income. The theory is that pervasive eye disease diminished the incentive to accumulate skills, thereby delaying the...

In this study we provide evidence that historical migration flows impact present-day global health differences. The underlying theory is based on three physiological facts. First, vitamin D deficiency is directly associated with increased risk of premature death. Second, the ability of humans to...

We account for competition for export markets among donor countries of foreign aid by analyzing spatial dependence in aid allocation. Employing sector-specific aid data, we find that the five largest donors react to aid giving by other donors with whom they compete in terms of exporting goods...

We study how NAFTA changed the geography of violence in Mexico. We propose that this open border policy increased trafficking profits of Mexican cartels, resulting in violent competition among them. We test this hypothesis by comparing changes in drug-related homicides after NAFTA's introduction...

We account for the competition for export markets among the donor countries of foreign aid by analyzing spatial dependence in aid allocation. We employ sector-specific aid data, distinguishing between first and second stage decisions on the selection of recipient countries and the amount of aid...