How physical capital differs from human capital with respect to the relationship with the owner? How do you think of the argument on the limited role of increasing human capital in economic growth? Physical capital is independent of its owner; that is to say that physical capital can be separated from its owner and can change ownership over the course of it development. Human capital on the other hand, is inherent to its owner and the two cannot be separated, both ensuring the owner has the possibility of enjoying benefits of investment in this type of capital, but also placing inherit limits on the quantity and potential transferability of this type of capital. The argument that the upper limits on human capital investment limits eventual marginal returns to future investment suggests that investment in human capital has a limited, or decreasing over time, impact on economic growth. We should be cautious to discredit human capital investment, however, because human capital investment also has an indirect impact on the efficiency and productivity of physical capital: as technology advances and the efficiency of physical capital depends more and more on technological advancement, human capital advancement, such as quality of schooling, becomes more and more important in the full utilization of the so called endless driving power of physical capital. Yes, our current scales of health are top censored and one can only enjoy so many years of schooling, but health standards improvements and quality of schooling are both constantly advancing targets.