Techknology
... Introduction: Theories of Economic Growth The study of economic growth has always received a great deal of attention and still remains a mystery. In the “baseline” original perspective of neoclassical economics, developed by Robert Solow in the 1950s, economic growth is mainly associated with capital accumulation (see Figure 1, Appendix), leaving technological progress apart and thus not explaining economical growth at all. ... Therefore, this is an exogenous model (growth is caused by forces that are not explained by the model itself). ... There are two major problems with this neoclassical growth model. First, the expected paths of capital accumulation (and associated growth) across countries are not really happening, and the anticipated convergence in growth rates has not been observed (it doesn’t explain the geographical diversity). Second, most of the growth observed in empirical studies could not be attributed to capital accumulation, the endogenous part of the model, but rather by technical change, the exogenous (and therefore unexplained) component. On the contrary, a “dynamic fringe” of economists has become attracted to the endogenous perspective attached to Paul Romer, who develops Solow’s theory, aiming to put the technological progress variable endogenous and believes that improvements in productivity can be linked to a faster pace of innovation and extra investment in human capital and that knowledge has a central role as a determinant of economic growth1. This model has the property that, even with no increases in total factor productivity and no population growth, there can be unlimited growth in aggregate output and consumption, fuelled by growth in the stock of human capital (skills and education). This theory also predicts positive externalities and spillover effects from development of a high value-added knowledge economy which is able to develop and maintain a competitive advantage in growth industries in the global economy. It stresses that appropriate there are increasing returns from higher levels of capital investment, private investment in R&D is the central source of technical progress and investment in human capital is an essential ingredient of growth. ... In the long-run, growth is based on diminishing returns of this function. ... , independent of economic conditions) and capital and effective labour (labour times knowledge) are assumed to exhibit constant returns to scale. ... Hence, output is a function of the stock of capital per capita, increasing productivity requires accumulating capital at a pace faster than population growth. Because diminishing returns to capital accumulation are assumed, growth on the earlier stages is rapid, but it slows down at later stages, eventually reaching zero. The consequence is a natural and inexorable convergence of growth and productivity across countries. When the stage of zero growth by capital accumulation is reached, further development is determined by a rate of technical change - increases in the efficiency of the use of capital - that the model considers exogenously determined. ... Thereby, if there is technological progress (capital and labour rises over time), the amount of knowledge rises and output changes, converging economies to a certain level, with no growth at all. ... In contrast to models based in diminishing returns, growth rates can be increasing over time, the effects of small disturbances can be amplified by the actions of private agents, and large countries may always grow faster than small ones. ... When Maddison measured productivity growth rate over intervals several decades long and compared over almost 3 centuries, the evidence clearly suggested that it has been increasing. Furthermore, studies from Ramsey, Cass, Koopmans, Arrow, Levhari and Sheshinski [1] showed that countries with more extensive prior development appear to benefit from periods of rapid worldwide growth and suffer less during any slowdown. Growth rates appear to be increasing not only by the calendar time, but also as a function of the development level. ... Nonrival and intangible capital goods leading to increasing returns to scale According to Paul Romer [2], we can identify two fundamental attributes of any economic good – the degree to which it is rivalrous and the degree to which it is excludable. ... This the most fundamental and is taken to be defining characteristic of 1 Endogenous growth theory explores some of the key limitations of the original neoclassical model, in particular the assumptions related to technology (see Fig. ... Economics of Growth and Innovation I Assignment 1 By Marco Bravo Page 2 technology. ... knowledge with raw materials is inherently different from other economic goods). ... Nevertheless, I can identify two implications of nonrivalry in the theory of growth. ... However, once the following three premises are granted, occurs increasing returns and natural equilibrium with price-taking cannot be attained: #1: technological change lies in the heart of economical growth, providing the incentive for continued capital accumulation; #2: technological change arises in large part because of intentional acts taken by people who respond to market incentives; #3: intangible capital goods such as knowledge or instructions are purely nonrival.