I'm reminded of a quip from a former Yale professor:

A friend who teaches at the University of Connecticut once complained to me that his students don’t think for themselves. Well, I said, Yale students think for themselves, but only because they know we want them to.

As for hard facts and statistics, I imagine Charles Murray's recent book or Hayes's new book Twilight of the Elites (both of which I have heard good things about) might provide some.