This paper reports the results of a major study of the impact of international agricultural research, covering eleven crops in all major regions of the developing world, over the period 1960-2000. Although much of the "common wisdom" concerning the Green Revolution suggests that gains from...

A longstanding question in economics is why some countries are so much richer than others. Today, for example, income per capita in the world's richest countries is roughly thirty-five times greater than it is in the world's poorest countries. Recent work argues that the proximate cause of the...