Advanced human capital requires "basic" human capital as an input. Physical capital does not, in general, have such hierarchical structure. This paper models optimal investment in hierarchical human capital as well as nonhierarchical physical capital. The authors analyze the steady state,...

This article develops a two-country endogenous growth model with accumulation of both physical and human capital. We establish the existence of two-country balanced growth equilibria with physical and human capital in which a static and dynamic version of the Heckscher-Ohlin (HO) hypothesis hold...