Trends in Earnings Differentials across College Majors and the Changing Task Composition of Jobs
Joseph G. Altonji, Lisa B. Kahn, Jamin D. Speer
American Economic Review · 2014 · Volume 104 · Issue 5
Abstract
We show that, among college graduates, earnings differentials across field of study have increased substantially since the early 1990s. We study the degree to which this increase can be accounted for by changes in the labor market return to skills associated with a major. To do so, we define major-specific measures of the relative importance of abstract, routine, and manual tasks on the job, by linking majors to the occupations they typically lead to. Changes in the relationship between earnings and these measures can account for about two-thirds of the rise in inequality.
Keywords
Human Capital, Skills, Occupational Choice, Labor Productivity, Wage Level and Structure, Wage Differentials
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