[ D] In addition to the effects on individual labour market success, education is also linked to macroeconomic outcomes. Modern theories of economic growth show that a nation's human capital affects its growth path. A high level of human capital in a society fosters productivity, research and innovation, which leads to the development of new technologies, and the acquisition of new production methods. These indirect effects of education promote economic growth and thereby help to maintain and increase the wealth of nations, especially in a globalised world. Research in this field focuses on the link between education and growth or development in cross-country comparisons.