This paper examines theory and evidence from recent studies into the contributions to economic growth of expenditure on education and on research and development. Investment in human capital has fundamentally different economic attributes to physical investment - exhibiting complementarity,...

Two recently improved sets of cross-country panel data are combined in orderto re-examine the effects of population growth and fertility on economicgrowth. Using a 107 country panel data set covering 1960-85, we find thathigh birth rates appear to reduce economic growth through investment...