into a process of decline and have shrunk to a small fraction of their former population. Are there ghost countries …—countries that, if there were population mobility, would only have a very small fraction of their current population? This paper … “desired population” of any given geographic region varies substantially. First, the variance of growth rates of populations …

-skill migration. Those policies have been justified as Pigovian regulations to raise efficiency by internalizing externalities, and as …

Does the emigration of highly-skilled workers deplete local human capital? The answer is not obvious if migration … emigration began unexpectedly and has occurred only in a well-defined subset of the population, creating a treatment group that …

The migration of doctors and nurses from Africa to rich countries has raised fears of an African medical brain drain … countries did they leave? Where have they settled? As part of a larger study of the consequences of the international migration … and nurses to the nine most important destination countries. It is the first database of net bilateral migration flows …

has any interpretation as a welfare measure, exclusive focus on the nationally resident population can lead to substantial … errors of the income of the natural population for countries where emigration is an important path to greater welfare. The … conservative, if rough, estimate is that three quarters of this difference represents the effect of international migration on …

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 consider a range of international development processes. These include human …

remittances is rising migration, which has an opportunity cost to economic product at the origin. Net of that cost, there is … little reason to expect large growth effects of remittances in the origin economy. Migration and remittances clearly have …