Admission standards, student effort, and the creation of skilled jobs

We consider the implications of expanding enrollment through lower standards in a model with human capital externalities and a market failure. Workers and firms make uncoordinated investment choices prior to random matching. Investment choices depend on the expected productivity of the counterpart in production. The setting generates a potential human capital externality as a more skilled labor force induces more skilled job openings. Exploiting the externality is complicated by a market failure which may cause some workers to earn a degree but not put forth the effort required to become highly skilled. We show that beyond a threshold, increased enrollment through low standards can be poor policy. Policies which increase returns to agents and firms in best matches can improve outcomes.