Every year he asks foreign students in his classes at Duke University how many intend to stay permanently in the United States. “It used to be that everyone raised their hand,” Wadhwa says. “Now they look at you funny. They say, ‘What does that mean?’”
Although Rosenkopf has not studied the knowledge flow of immigrants, her research on networks and alliances indicates that a move of immigrants back home could result in an increasing exchange between countries.