I think he has a point, though. This study doesn't seem to control for an incredibly important variable: student interests. If one school tends to attract stud

I think he has a point, though. This study doesn't seem to control for an incredibly important variable: student interests. If one school tends to attract students interested in making a lot of money, and another school tends to attract students interested more in academics and graduate school, can one really conclude that the former adds more value? Perhaps, but certainly not without taking into account the different student interests and inclinations towards money-making. They do control for field of study, but I don't think this is sufficient. A school that attracts a lot of STEM majors who go to graduate school instead of industry is pretty much going to get destroyed in this study.