This is volume 18 issue 4 of Journal of Human Capital. The Journal of Human Capital (JHC) is dedicated to human capital and its expanding economic and social roles in the contemporary knowledge economy. It explores the role human capital plays in the production, allocation, and distribution of economic resources and in supporting long-term economic growth and development. JHC is designed to bring together theoretical and empirical work on human capital—broadly defined to include education, skill, health, entrepreneurship, and intellectual and social capital—and related public policy issues.