There has been little rigorous evaluation of immigration barriers intended to improve domestic terms of employment by shrinking the workforce. We study one such barrier, a policy change that excluded almost half a million Mexican bracero seasonal agricultural workers from the United States....

A recent surge in child migration to the U.S. from Honduras, El Salvador, and Guatemala has occurred in the context of high rates of regional violence. But little quantitative evidence exists on the causal relationship between violence and international emigration in this or any other region....

Past research on aid and growth is flawed because it typically examines the impact of aggregate aid on growth over a short period, usually four years, while significant portions of aid are unlikely to affect growth in such a brief time. We divide aid into three categories: (1) emergency and...

Raising school enrollment, like economic development in general, takes a long time. This is partly because, as a mountain of empirical evidence now shows, economic conditions and slowly-changing parental education levels determine children's school enrollment to a greater degree than education...

When is the rigorous impact evaluation of development projects a luxury, and when is it a necessity? The authors study one high-profile case: the Millennium Villages Project (MVP), an experimental and intensive package intervention to spark sustained local economic development in rural Africa....

This study uses a unique natural experiment to test a simple model of international differences in workers’ wages and productivity. Large differences in wages across countries could arise from several sources. These include barriers to trade in outputs, differences in technology, differences...

The emigration of highly skilled workers can in theory lower social welfare in the migrant-sending country. If such workers produce a good whose consumption conveys a positive externality - such as nurses and doctors in a very poor country - the loss can be greater, and welfare can even decline...

Research on migration and development has recently changed, in two ways. First, it has grown sharply in volume, emerging as a proper subfield. Second, while it once embraced principally rural-urban migration and international remittances, migration and development research has broadened to...

The most basic economic theory suggests that rising incomes in developing countries will deter emigration from those countries, an idea that captivates policymakers in international aid and trade diplomacy. A lengthy research literature and recent data suggest something quite different: that...

The Millennium Villages Project is a high profile, multi-country development project that has aimed to serve as a model for ending rural poverty in sub-Saharan Africa. The project became the subject of controversy when the methodological basis of early claims of success was questioned. The...