Identifying Human Capital Externalities: Theory with an Application to Us Cities
52 Pages Posted: 9 Jun 2002
Date Written: April 2002
Identification of the strength of human capital externalities at the aggregate level is still not fully understood. The existing method may yield positive or negative externalities even if wages reflect marginal social products. We propose an approach that yields positive average human capital externalities if and only if the marginal social product of workers with aboveaverage human capital exceeds their wage. As an application, we estimate the strength of average-schooling externalities in US cities between 1970 and 1990.
Keywords: Marginal Social Product of Human Capital, Wages, Human Capital Externalities, Imperfect Substitution, Perfect Substitution, Cities
JEL Classification: O0, O4, R0, J3
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