Rich countries have made efforts for half a century to help people in poor countries catch up to rich-country standards of living. Those efforts have included giving foreign aid, encouraging overseas investment, dismantling trade barriers, and spreading ideas and institutions. That is, their...

Large numbers of doctors, engineers, and other skilled workers from developing countries choose to move to other countries. Do their choices threaten development? The answer appears so obvious that their movement is most commonly known by the pejorative term “brain drain.” This paper...

Global private capital flows have barely touched the poorest nations; the rich invest mostly with the rich. Confronted with this wealth bias in cross-border investment flows, one of the starkest facts of the global economy, theorists and empiricists have spent roughly the last decade looking for...

The international goal for rich countries to devote 0.7% of their national income to development assistance has become a cause célèbre for aid activists and has been accepted in many official quarters as the legitimate target for aid budgets. The origins of the target, however, raise serious...

What should the World Bank optimally do with the US$10 to $20 billion it can loan each year? Has it, in fact, done what is optimal? These two questions, one theoretical and one empirical, have been around for a long time and remain controversial in both academic and policy circles. This study...

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...

Does the emigration of highly-skilled workers deplete local human capital? The answer is not obvious if migration prospects induce human capital formation. We analyze a unique natural quasi-experiment in the Republic of the Fiji Islands, where political shocks have provoked one of the largest...

We compare the wages of workers inside the United States to the wages of observably identical workers outside the United States—controlling for country of birth, country of education, years of education, work experience, sex, and ruralurban residence. This is made possible by new and uniquely...

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...

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...