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 …

We propose a model of intergenerational transmission of education wherein children belong to either highly educated or … interactions with other low-educated students (i.e., homophily), which reduces the education effort of their parents and, thus … kids from different education backgrounds can be effective in reducing the education gap between them. …