Pittsburgh's Newest Immigrants: The Region is Unusual in Both the Number and Nature of its Newcomers (Christine H. O'Toole) from the Pittsburgh Quarterly
"Although only 3 percent of the region's residents are foreign-born, they comprise the most highly skilled immigrant group in the entire country, with a concentration of expertise in science and engineering. Like Tek, over 53 percent (30,542) hold a bachelor's degree or higher. "