Why do lower-income students now earn a smaller college wage premium?
Core argument: Students from the bottom parental income tercile earn less than half the college enrollment wage premium received by top-tercile students, a gap driven more by sector and field of study than by access to high-quality universities or net tuition costs.
Lower-income students have become less likely to enroll in the traditional 4-year university sector than their peers, experienced declines in the relative value of the public teaching oriented universities where they have long enrolled, and become less likely to study high-value fields like computer science. These forces– more than changes in high-quality university access or net tuition costs– now lead students from the bottom parental income tercile [i.e. third] to earn less than half the enrollment wage premium received by top-tercile students. The relative decline in higher education’s value for lower-income Americans can largely be explained by three factors: the rising relative value of higher-income students’ research-oriented universities, lower-income students’ increasing diversion to community and for profit colleges, and lower-income students’ redirection out of computer science and engineering into the shrinking humanities disciplines within four-year universities. Differential selection into college, reallocation of students within the four-year sector, and changes in the value of different college majors have played minimal roles, especially in recent years.



