Hopes for development aid remain high among Western politicians and pundits, but the evidence is depressing. Foreign aid has on average probably no effect on long-run growth. To understand the failure of many development projects, we need a deeper consideration of the failure of top-down...

Artificial states are those in which political borders do not coincide with a division of nationalities desired by the people on the ground. We propose and compute for all countries in the world two new measures how artificial states are. One is based on measuring how borders split ethnic groups...

After excluding countries with high-inflation crises - periods when annual inflation is above 40 percent - the data reveal no evidence of a consistent relationship between growth and inflation, at any frequency. But growth does tend to fall sharply during discrete crises of high inflation and to...

The new growth literature, using both endogenous growth and neoclassical models, has generated strong claims for the effect of national policies on economic growth. Empirical work on policies and growth has tended to confirm these claims. This paper casts doubt on this claim for strong effects...

The Schelling model of a "tipping point" in racial segregation, in which whites flee a neighborhood in large numbers once a threshold of nonwhites is reached, is a canonical model of strategic interdependence. Moreover, the idea of "tipping" explaining segregation is widely accepted in the...

The Schelling model of a "tipping point" in racial segregation, in which whites flee a neighborhood once a threshold of nonwhites is reached, is a canonical model of strategic interdependence. The idea of "tipping" explaining segregation is widely accepted in the academic literature and popular...

National economic policies’ effects on growth were over-emphasized in the early literature on endogenous economic growth. Most of the early theoretical models of the new growth literature (and even their new neoclassical counterparts) predicted large policy effects, which was followed by...

The Schelling model of a "tipping point" in racial segregation, in which whites flee a neighborhood once a threshold of nonwhites is reached, is a canonical model of strategic interdependence. The idea of "tipping" explaining segregation is widely accepted in the academic literature and popular...

Using a newly assembled dataset spanning from 1820 to 1998, we study the relationship between the occurrence and magnitude of episodes of mass killing and the levels of development and democracy across countries and over time. Mass killings appear to be more likely at intermediate levels of...