A recent report, Foreign Born Scientists: Mobility Patterns for Sixteen Countries, published by the National Bureau of Economic Research, highlights results from the "first systematic study of the mobility of scientists engaged in research in a large number of countries. ... Switzerland has the largest percent of immigrant scientists working in country (56.7); Canada, and Australia trail by nine or more percent; the U.S. and Sweden by approximately eighteen percent. India has the lowest (0.8), followed closely by Italy and Japan. The most likely reason to come to a country for postdoctoral study or work is professional."

The report is available at: www.nber.org/papers/w18067.pdf.