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The U.S. college wage premium doubles over the life cycle, from 27 percent at age 25 to 60 percent at age 55. Using a panel survey of workers followed through age 60, I show that growth in the college wage premium is primarily explained by occupational sorting. Shortly after graduating, workers with college degrees shift into professional, nonroutine occupations with much greater returns to tenure. Nearly 90 percent of life cycle wage growth occurs within rather than between jobs. To understand these patterns, I develop a model of human capital investment where workers differ in learning ability and jobs vary in complexity. Faster learners complete more education and sort into complex jobs with greater returns to investment. College acts as a gateway to professional occupations, which offer more opportunity for wage growth through on-the-job learning.
That is from a new paper by David J. Deming. You will note how this relates to the signaling vs. human capital debates over education. Signaling your quality may put you in a position to learn more over time, as your initial offer likely will be better if you come out of Harvard. But over the longer haul, the wages you earn are the result of what you have learned, not just your initial level of quality. So most of the return to education is that you learn more over time, and thus most of the return is learning-related rather than initial quality-related. Overall, signaling models behave rather awkwardly in dynamic rather than purely static settings.
The post Why do wages grow faster for educated workers? appeared first on Marginal REVOLUTION.
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