The study report — released in October — said 87.9% of them were residing or employed in the US, 5.6% in Asia and 2.5% in Europe.
“The survey did not collect data on preferred employment location or reasons that influence employment choices or opportunities.
We will need more data to help us better understand the outcome,” Wan-Ying Chang, one of the authors of the report, told HT.
The proportion of foreigners among those awarded US PhDs increased from 17% in 1961-70 to 40% by 2010, the study said.
According to an article in the journal Nature, citing a survey of 17,000 researchers across 16 countries, India sends the largest proportion of its scientists overseas, with 75% going to the US.