RT Journal Article SR Electronic T1 Major-Occupation Specificity and College Skill Production JF Journal of Human Resources JO J Hum Resour FD University of Wisconsin Press SP 1219-10631R3 DO 10.3368/jhr.1219-10631R3 A1 Li, Xiaoxiao A1 Linde, Sebastian A1 Shimao, Hajime YR 2025 UL http://jhr.uwpress.org/content/early/2025/01/03/jhr.1219-10631R3.abstract AB We propose an easily computable measure called Major-Occupation Specificity (MOS) that captures the latent skills imparted by different college majors. Specifically, we apply the Method of Reflections, which is an iterative algorithm that originated in the context of international trade, to parse a major-to-occupation flow network and formulate a scalar measure of major specificity that is distinct from existing metrics. Empirically, our MOS index appears to be a potent factor in explaining individual earnings and employment differences across college majors, and the results remain robust after considering confounding factors and aggregation issues. Further results suggest that the MOS index can not only account for current income disparities but also predict future major-level earnings growth, a feat beyond the capability of existing major-specificity indices. Additional exercises reveal that the MOS index strongly relates to advanced skills such as critical and analytical thinking, as well as the ability to analyze and solve quantitative, practical, and complex problems.