Those who earn bachelor's degrees do indeed earn more than those with only a high school education. But many people are vastly overpaying for this benefit.
Not to mention that this is not a controlled experiment. Maybe those who earn degrees would have earned more anyway. (Though I do suspect that college is very beneficial, for the reasons you cite.)
Not to mention that this is not a controlled experiment. Maybe those who earn degrees would have earned more anyway. (Though I do suspect that college is very beneficial, for the reasons you cite.)