Good stuff. It should be noted though that it's not really calculating NPV for the students themselves, as it can't measure what the students' earnings would ha

Good stuff. It should be noted though that it's not really calculating NPV for the students themselves, as it can't measure what the students' earnings would have been had they not gone to college (or gone to a different college). Much of the difference in measured NPV across colleges will be due to the quality of students, not the quality of education / opportunities provided by the college.