I think this is best explained as an effect of the "go to college" mantra shoved on kids in the 80s and 90s. There are fewer and fewer adults who are not alread

I think this is best explained as an effect of the "go to college" mantra shoved on kids in the 80s and 90s. There are fewer and fewer adults who are not already college educated. (http://en.wikipedia.org/wiki/Educational_attainment_in_the_United_States http://en.wikipedia.org/wiki/Educational_attainment_in_the_U...)