The document discusses human capital in terms of education, abilities, creativity, training, skills and knowledge. It notes that governments, employers and individuals all spend resources on education and training because they expect returns in the form of faster economic development, increased productivity and higher earnings. However, insufficient economic growth or poor education quality can limit demand for human capital. While developing countries spend a smaller percentage of GDP on education than developed countries, private spending varies significantly between countries and does not correlate directly with income level. The different levels of education discussed are primary, secondary, tertiary and vocational.