The data for Messrs Aguiar and Hurst's study comes from time-use diaries that American social scientists have been collecting methodically, once a decade, since 1965 (the latest one used in their paper was from 2003).
He was also featured in a recent study by the National Foundation for American Policy that found 35 percent of the physician scientists at the Johns Hopkins Sidney Kimmel Comprehensive Cancer Center are immigrants.
Chao is President of the American Neuroscience Association and a key decision-maker as to which scientists are able to get research money to study the brain from the National Institute of Health.