Relevant to the discussion Andrew and I had of “brain drain” in the developing world is this vehement yet brilliant piece by Michael Clemens, guest posting at chrisblattman.com.
The whole thing is worth reading but I liked this quote the best:
Furthermore, African-trained members of the American Medical Association send home to Africa, on average, over $6,000 per year, even 20 years after arriving in the United States—including those who send no money. Far from being “scant compensation”, this means that the typical African-trained doctor coming to the United States has sent back much more than the cost of training another doctor in the country he or she came from.
Such large remittances make my whole discussion of public vs. private funding of medical education in the developing world moot.
Clemens has also made the claim that migration is the single most effective development tool the world has ever seen, an argument to which I am quite sympathetic.