When the phone rang around 2 a.m. telling David Card that he won the Nobel Prize for Economics, the Canadian-born economist thought it was a stunt. But when he saw the phone showing a Swedish number he thought maybe it wasn’t a joke after all. “I have an old friend I met in ninth-grade English class,” he said with a chuckle at a news conference Monday. “When the teacher threw a book at him, it hit me by accident. He is the kind of guy who would pull this stunt.” Guelph, Ont., born Card, 65, was awarded one half of the prize, while the other half was shared by Joshua Angrist from the Massachusetts Institute of Technology and Dutch-born Guido Imbens, 58, from Stanford University. Card, of the University of California at Berkeley, is being recognized for pioneering research on the labour market impacts of minimum wages, immigration and education. …