Ummmm, doesn't the article implicitly address that? If your country is well educated, wealth increases. It's change in wealth that is correlated with educatio

Ummmm, doesn't the article implicitly address that? If your country is well educated, wealth increases. It's change in wealth that is correlated with education, not wealth itself. Or to put it another way, I have trouble imagining how wealth in 2008 can affect education levels in 1900, and I can't really think of a third variable to arbitrate between the two either, seeing as they are separated in time...