we paid X and student got a job paying Y, therefore it is/not a strong ROI
There are several issues to break down. Paying X for college and having a job that pays Y tells you very little about financial ROI. Financial ROI instead depends no how much attending college X improved financial outcome over alternative Y (alternative may be attending a different college, or may be doing something other than college). This can’t be measured well by comparing average earnings at college X vs college Y due to differences in individual student factors at the 2 colleges, as well as differences in major distribution.
Rather than compare average/median students at the 2 colleges, a better method is to compare outcomes between similar students who choose different colleges. For example, suppose you have a group of students with similar stats who applied to similar colleges. For a particular college, some of those students were accepted from waitlist and some were rejected from waitlist. How do outcomes differ among students who are accepted from waitlist vs students who are rejected from waitlist?
“Outcomes” usually emphasizes first activity after college – salary at first job, accepted to grad/professional school, etc. However, as you note, “outcome” can me other less objective measures of success such as having a quality education or growth experience.
In recent years, there has been a shift more towards pre-professional and STEM majors and less towards humanities majors. This isn’t the same as financial ROI. For example, in another thread, I looked up the most common bachelor’s degree fields among 4-years colleges in US. A list is below. The popular fields with the largest increase were all STEM related, but they weren’t all associated with a large income. Biology is associated with a lower salary with only a bachelor’s, yet it is the most popular STEM major (unless you count nursing as STEM). The overwhelming majority of biology majors do not attend med school.
- Nursing (large increase)
- Business
- Biology (large increase)
- Psychology
- Engineering (large increase)
- CS Related (large increase)
- Education (decrease)
- Visual and Performing Arts
While financial ROI is one factor in this change. I think a bigger one is changes in societal/community/family/peer/… perception of STEM vs humanities. For example, the timing of the especially sharp humanities decline across all US colleges started during the great financial crisis, but the timing also coincided with Obama’s 2009 Education to Innovate program, with stated goals “to increase STEM literacy, enhance teaching quality, and expand educational and career opportunities for America’s youth.” The program included over $1 billon funding for STEM education. During this period I expect students had increasing pressure from parents, friends, teachers, and the general community to favor STEM fields over fields like English and history. This also contributes to why humanities major enrollment kept dropping after the great financial crisis was over and there was largely economic prosperity.
The specific years of change in major distribution doesn’t follow doesn’t follow changes in college sticker price well. If we are talking about highly selective private colleges, it’s often common for the majority of students to not pay sticker price. At many such colleges, inflation adjusted average price paid by students is largely unchanged over previous decades. The difference is a there is wider variability in prices paid, with many students paying >$80k/year, as well as many students having estimated cost to parents of $0. Both free ride students and full pay students overwhelmingly favor STEM fields over liberal arts. At many highly selective colleges, $0 cost to parents students are notably more likely to favor pre-professional majors over liberal arts than kids paying sticker price. ROI focused major distribution doesn’t follow price paid well.