1 Subjects: “...Aggregate Human Capital...”

2 Subjects: “...Human Capital...”

3 Subjects: “...Human Capital...”

4 Subjects: “...Human Capital...”

5 Subjects: “...Aggregate Human Capital...”

6 “... globalization and technological changes increase the returns on human capital, underscoring the importance...”

7 “..., and the supply of skilled human resources for science and technology. Two central themes developed in the paper...”