Economic growth and economic development 169

CHAPTER Fundamental Determinants of Differences in Economic Performance 4.1 Proximate Versus Fundamental Causes “ the factors we have listed (innovation, economies of scale, education, capital accumulation etc.) are not causes of growth; they are growth.” (North and Thomas, 1973, p 2, italics in original) The previous chapter illustrate how the Solow growth model can be used to understand cross-country income differences and the process of economic growth In the context of the Solow growth model, the process of economic growth is driven by technological progress Cross-country income differences, on the other hand, are due to a combination of technology differences, differences in physical capital per worker and in human capital per worker While this approach provides us with a good starting point and delineates potential sources of economic growth and cross-country income differences, these sources are only proximate causes of economic growth and economic success Let us focus on cross-country income differences, for example As soon as we attempt to explain these differences with technology, physical capital and human capital differences, an obvious next question presents itself: if technology, physical capital and human capital are so important in understanding differences in the wealth of nations and if they can account for five-fold, ten-fold, twenty-fold or even thirty-fold differences in income per capita across countries, then why is it that societies not improve their technologies, invest more in physical capital, and accumulate more human capital? It appears therefore that any explanation that simply relies on technology, physical capital and human capital differences across countries is, at some level, incomplete There must be some other reasons underneath those, reasons which we will 155