A factory full of machines is useless without people who know how to run them. Human capital is the skills, knowledge, and experience that workers bring to a job. It includes formal education, on-the-job training, and the intangible know-how that comes from years of practice. Economists treat it as a form of capital because it is created through investment and yields returns over time.

Investing in human capital pays off. Countries that educate their populations grow faster. Workers with more skills earn more. Firms that train employees are more productive. The returns are not just private. An educated population produces better citizens, healthier families, and more innovation. That is why public education is one of the oldest and most popular government programs.

Human capital can depreciate. Skills go stale if not used. Workers who lose jobs in declining industries find their human capital worth less in new ones. Retraining programs aim to rebuild it, with mixed results. The best time to invest is early, but it is never too late.

Forms of human capital

• Formal education and degrees
• Vocational training and apprenticeships
• On-the-job experience
• Health and physical capacity
• Soft skills like communication and teamwork