Effects of demographic factors on technological change and economic growth

The endogenous technology literature usually treats human capital as proportional to the population level. As a result, it finds a linear relationship between the population size or growth rate and technological improvement. In this paper I introduce human capital investment in an endogenous technology framework. It is shown that population affects technological improvement both directly and through the stream of human capital, with technology also having a feedback effect on the latter. These multiple effects of demographic factors on R&D, human capital and economic growth can explain certain facts, such as the growth patterns of the last two centuries