Study On The Contribution Of S&T Input And High-tech Industry On Chinese Economic Development

Since the human society has stepped into the era of21st century knowledge economy, the competition of comprehensive national strength based on economic strength is becoming increasingly fierce. Whether China can stay independent and competitive in international economic activities is dependent on high quality economic growth in certain extent, while the high quality growth of economy is largely dependent on the contribution of science to economic growth. Based on science and technology investment theory, high tech industry theory and economic growth, and combined with the grey system theory, this paper analyzed the contribution of high tech industry to economic growth. The chief content are as followed:Chapter1proposes the research background, purpose, meaning and the research profile of domestic and international, introduces the analysis methods of S&T input and technology spillover contributing to economic growth,those of industrial sector’s contributing to economic growth and research methods of grey system theory and grey number.Chapter2introduces S&T input theory,high-tech industries theory and associated economic growth theory, which expresses the significance of S&T input and high-tech industry in economic growth, and also shows that their contribution to economic growth has important scientific significance and value.Chapter3improves the current C-D production function model based on the time-lag effect in the process of S&T promoting the development of economy, and the knowledge Spillover Effect of G7states’S&T inputs influencing Chinese economy growth, and discusses the contribution relationship between China and G7states’S&T input and the economic growth of China from2004to2009. In the method, we firstly apply grey lag correlation analysis to identify the lag period between S&T input and the economic growth of our country, and then on the basis of the modified C-D production function, we employ technology knowledge stock which reflects the time-lag in the calculation instead of R&D investment, finally we get the contribution degree of Chinese and G7states’science and technology investment on Chinese economic growth. The modified production function model is more consistent with the actual situation, and can analyze the contribution degree of science and technology on economic growth more macroscopically and perfectly.Chapter4analyzes the contribution of high-tech industry to economic systems under the situation when the classic contribution model no longer applies as the economic data becomes grey number. In the method, we firstly give a definition of kernel and grey degree of interval grey number based on whitenization function and the associated equilibrium point and the external adjustment degree, then offer the algorithms and the contribution model of high-tech industries to economic system based on grey number and input-output theory, and finally carry on an empirical analysis on the five industries for high-tech industry’s contribution to economic systems, from which I get the equilibrium point of the industrial and economic system in the development process and the external adjustment degree to achieve it.Chapter5introduces the main research contents, research results and innovation points, and also discusses the prospect of the future research work.