Although measured remittances by migrant workers have soared in recent years, macroeconomic studies have difficulty detecting their effect on economic growth. This paper reviews existing explanations for this puzzle and proposes three new ones. First, it offers evidence that a large majority of...

Growing concern that the Millennium Development Goals (MDGs) will not be achieved by 2015 should not obscure the bigger picture that development progress has been occurring at unprecedented levels over the past thirty or more years. At the same time, the MDGs may perhaps create an unnecessary...

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 literature and recent data suggest something quite different: that over the...

The welcome rise of replication tests in economics has not been accompanied by a single, clear definition of replication. A discrepant replication, in current usage of the term, can signal anything from an unremarkable disagreement over methods to scientific incompetence or misconduct. This...

It is easy to learn the average income of a resident of El Salvador or Albania. But there is no systematic source of information on the average income of a Salvadoran or Albanian. We estimate a new statistic: income per natural-the mean annual income of all people born in a given country,...

The migration of doctors and nurses from Africa to rich countries has raised fears of an African medical brain drain. But empirical research on the issue has been hampered by lack of data. How many doctors and nurses have left Africa? Which countries did they leave? Where have they settled? As...

What is the greatest single class of distortions in the global economy? One contender for this title is the tightly binding constraints on emigration from poor countries. Vast numbers of people in low-income countries want to emigrate from those countries but cannot. How large are the economic...

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

Labor markets are increasingly global. Overseas work can enrich households but also split them geographically, with ambiguous net effects on decisions about work, investment, and education. These net effects, and their mechanisms, are poorly understood. We study a policy discontinuity in the...