writes "A 24-page paper on a reverse brain drain from the US back to home countries (PDF) is getting news coverage. Quoting: 'Our new paper, "America's Loss Is the World's Gain," finds that the vast majority of these returnees were relatively young. The average age was 30 for Indian returnees, and 33 for Chinese. They were highly educated, with degrees in management, technology, or science. Fifty-one percent of the Chinese held master's degrees and 41% had PhDs. Sixty-six percent of the Indians held a master's and 12.1% had PhDs. They were at very top of the educational distribution for these highly educated immigrant groups — precisely the kind of people who make the greatest contribution to the US economy and to business and job growth."
Adding to the brain drain is a problem with slow US visa processing, since last November or so, that has been driving desirable students and scientists out
of the country.