Originally Posted by
Loki
A) I've yet to see a convincing study on the benefits of a college degree that accounted for selection bias (i.e. the characteristics of the students going to college). I suspect the real advantage is substantially smaller than the numbers that are usually thrown around.
B) You're assuming that people will use long-term rationality instead of short or medium-rationality. You're doing this despite knowing that the poor are precisely the group that doesn't take a long-term view. As I pointed out, at a reasonable estimate, it would take well over a decade for someone who goes to college to catch up to someone who's worked the entire time. Sure, there are a few fields where this happens much quicker (engineering, finance, etc.), but who tends to go into those fields? First-generation college students? All a $15 minimum wage would do is worsen income and social inequality be persuading the poor that they have no need to get an education (Spain is seeing the consequences first hand after the construction boom led to a whole generation of poor students dropping out and getting construction jobs).
C) The effect of this minimum wage on the economy would vary significantly from industry to industry. I suspect that it might gut entire sectors of the economy (retail and fast food in particular) or at least sharply reduce the number of jobs in those sectors. What's going to happen to the unskilled labor that depends on those sectors? We're going to end up with a huge number of long-term unemployed.
D) As I already mentioned, the larger the disparity between market wages and a minimum wage, the larger the role a black market will play. If your average unskilled worker "deserves" $10 in wages but gets $15, and there's no real difference between the unskilled workers, we're going to have a significant new black market in getting these jobs. Just go to to any third world country with a large (overpaid) public sector for examples of how this would work in practice.
As for people working through college: they tend to take longer to graduate. Which means they'll have even more in foregone earnings. In fact, the economically rational thing to do would be to graduate college as fast as possible, because your wages right after graduation are going to be much higher than your wages while in college.