Harvard’s Raj Chetty has a habit of mistaking causation. Not too long ago he astounded the easily-astounded David Brooks with research that “found that poor children who grew up in places where people have more friendships that cut across class lines earn a lot more as adults than children who don’t.” As readers can perhaps imagine given Brooks’s excitement, Chetty mistook the cause of the higher earnings. If you’re hanging around the higher classes, that plainly says a lot about you, your parents, their ambitions for you, and values conducive to success.
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