Why is human capital considered a key determinant of long-run growth, and how can education policy affect growth?

• A. Human capital raises productivity; policy can boost growth via education spending, training.
• B. Education policy has no effect on long-run growth.
• C. Human capital is irrelevant if technology is constant.
• D. Investment in physical capital replaces the need for education.

Answer: (D)

Human capital boosts long-run growth because it directly raises how productive workers are and how effectively they can use and improve the tools around them. When people are educated and skilled, they can operate more advanced machines, adapt to new technologies, and design or implement better processes. That extra productivity from a smarter workforce makes each unit of capital more valuable, so the economy can produce more output with the same inputs over time.

Education policy matters because it influences the size and quality of the workforce’s skills. Government spending on schooling, training programs, and efforts to improve education quality increase the stock of human capital, which raises total factor productivity and can sustain faster growth even as physical capital accumulates. In other words, investing in people complements investment in machines and facilities, helping the economy adopt, utilize, and innovate with new technologies.

So the strongest idea here is that human capital raises productivity and that education policy can drive growth by building that productive, capable workforce. Investments solely in physical capital cannot substitute for the gains from a more educated workforce, since capital’s usefulness depends on people who can operate and improve it.