An interesting article at Political Calculations says that a professional degree is worth more than a doctorate. (I can tell you that’s true!) It also says that having some college is almost, but not quite as good, as having an associates’ degree.
Of course, these won’t be true over everyone. R looks more like a professional now (at 40), but his income won’t go up unless he does something new or goes with a new company. However, he’s got an incredible leap over normal bachelor folks.
None the less, it is an interesting presentation. And my teacher aide students would have enjoyed seeing that the yellow line is visibly higher than the blue one.