zlacker

> but at a first glance, that's not an unreasonable approach, as it tries to isolate the variable "facebook yes/no".

I agree it's not unreasonable, but you have to account for the fact that back then, most of the colleges that had it were top tier/high stress/highly selective colleges. Facebook started at Harvard, then went to Yale and Princeton, and then on to basically most of the US News top 50.