تحقیق در مورد تاثیر صرفه جویی در انرژی بر پیشرفت های فن آوری بر اساس تابع تولید کاب داگلاس

Energy issues receive more and more attention these days. And it is considered that technological progress is an essential approach to save energy. This essay is to analyze the relation between energy intensity and technological progress by Cobb–Douglas production function in which energy, labor, capital and technological progress are taken as independent variables. It proves that the growth of output per capital and output per labor will increase energy intensity while technological progress will decrease energy intensity. Empirical research on Chinese industry is used here to indicate technological progress greatly decreases energy intensity. Because of the interferences of Asian financial crisis, there is something abnormal in the data. So in the empirical research, average weaken buffer operator (ABWO) is applied to weaken the interference of Asian financial crisis to the fixed assets, energy and value added. The results of the empirical research show that technological progress decreases energy intensity of Chinese industry an average of 6.3% every year in China.

Energy consumption is so strongly related to economic growth that energy is one of the essential elements in modern economy. In terms of the economic growth of China, energy issue has become a core problem of its sustainable development. Since 2006, it has become an important aim of the government to decrease energy intensity. The energy-saving effect through adjusting industry structure is not obvious, and technological progress plays as the most effective method to reduce energy intensity. Technological progress has an effect on energy consumption in different ways. On the one hand, technological progress will create lots of new tools and new techniques to decrease energy consumption. On the other hand, technological progress will increase economic growth which will then cause energy consumption. So it is very complex to explain the relation between technological progress and energy consumption. The relation between energy intensity and technological progress is shown in Fig. 1.Pérez-Barahona and Zou (2006) analyze the hypothesis about the effectiveness of energy-saving technologies to reduce the trade-off between economic growth and energy preservation and show that positive growth is possible only if the growth rate of the energy-saving technological progress exceeds the decreasing rate of the energy supply. van Zon and Hakan Yetkiner (2003) extended the Romer model in two ways and concluded that in order to have energy efficiency growth and output growth under rising real energy prices, a combination of R&D and energy policy is called for. Ma et al. (2008) reveals Chinese energy intensity is increasing during the study period (1995–2004) and the major driver appears to be due to the increased use of energy-intensive technology. Boucekkine and Pommeret (2004) studied optimal capital accumulation at the firm level when technological progress is energy saving, and the optimal capital stock is shown to remain a decreasing function of the energy cost. Berglund and Söderholm (2006) provided an overview and a critical analysis of the literature on incorporating induced technical change in energy system models. Neij and Åstrand (2006) concluded that the information on the continuous performance of different policy instruments and their effects on the introduction and dissemination of new energy technologies, provided by this evaluation approach, is essential for an improved adaptation and implementation of energy and climate policy. These researches have studied the impact on energy consumption of technological progress, but they did not measure the effects quantitatively.

In this essay, capital, labor and energy are looked as the elements of economic growth, and Cobb–Douglas production function is applied. It is proved that technological progress will decrease the energy intensity. The empirical research of Chinese industry proves that too. ABWO is used to eliminate the main interference of Asian financial crisis, so the technological progress calculated by Cobb–Douglas production function may be more accurate.