Education has value beyond improving income potential. It would be really interesting to see correlation between those those who entered college only (or primarily) to improve income, and those who sought a humanities degree for other reasons, to see if they got out of the degree what they wanted.

This analysis also doesn't include minors or elective courses - I'm wondering how many folks (like myself) chose to pursue a humanities minor to get a lot of the value-add of studying something like philosophy without being pigeon-holed in a humanities pathway?