Persistent productivity gains to rural-urban migrants have been documented by a number ofresearchers. One interpretation of this result is that individuals learn higher value skills incities than they would have learned in less dense areas. Another explanation for this result,however, is that...

College-educated workers are twice as likely as high school graduates to make lasting long-distance moves, but little is known about the role of college itself in determining geographic mobility. Unobservable characteristics related to selection into college might also drive the relationship...