Abstract

Infrastructure investment has not only improved the level of infrastructure，but also promoted China's economic development，it is important factor that promotes China's economic development. The existing literature discussed the role of infrastructure on China's economic growth from the social output elasticity of infrastructure to its influence on private investment and export trade.However，The little literature has focused on infrastructure in China's technical innovation ability effect. In fact，although the FDI technology spillover to promote China's technical innovation ability and in particular,the intermediate goods trade of import trade rapidly development and the export trade competition have also promoted China's technical innovation ability.However，high technology patent was blocked by foreign direct investment，as well as the processing trade has seldomly promoted China's technical innovation ability because it can be in the lower end of the global value chain，hence，in the influence of the external technique,we must strengthen the independent innovation.Therefore，the infrastructure has influence on China's technical innovation ability，it is importanr factor to study the impact of infrastructure on China's technical innovation ability and explore its mechanism.

The dissertation study the role of infrastructure on China's technical innovation ability by general equilibrium models，the essay researchs the mechanism through which infrastructure affects technological innovation capability from information cost financing cost respectively.Based on theoretical model analysis,empirically study using data of cross-regional and cross-industry cross-province strongly support the main conclusions of the empirical model.This essay has seven parts. Chapter one states the background information，research methods，structure and innovation points. In chapter two,we revews the literature on infrastructure and economic growth and labor productivity. In chapter three，we study the the externality of infrastructure on regional technical innovation ability from the perspective of the combined effect using cointegration effect and impulse response impact. In chapter fourth,we build a general equilibrium theory model to study the impact mechanism of the infrastructure on import trade and its trade structure and use an empirical model to test the effect of infrastructure on China's regional innovation capacity. In chapter five，we investigate infrastructure on technological innovation capability from the perspective of export trade and export sophistication.In chapter six we investigate infrastructure on technological innovation capability from the perspective of financing cost,export trade and industry export sophistication using the date of cross-industry cross-province. Finally,chapter seven concludes the essay and gives some policy implications concerning infrastructure on technological innovation capability.The dissertation gets the following from theoretical and empirical studies. Firstly，high level of infrastructure has a significant positive effect on regional technological innovation capability，it is the main effect of agglomeration that the infrastructure enhances the level of human capital，international trade and foreign direct investment,high level of infrastructure has a significant positive effect on regional technological innovation capability by human capital，international trade and foreign direct investment.Secondly，regions with high level of infrastructure have more technological innovation ability in the import trade volumes of area.It is more importmant that import trade international technology spillover of R&D more than import trade volumes for technological innovation ability promotion.The resulr of regionals show service trade's international R&D of the eastern region significantly promotes the technological innovation ability improvement,but the western is opposite.Thirdly，high level of infrastructure has a significant effect on export trade structure and regional technical innovation ability promotion，high level of infrastructure of region has a significant positive effect on regional technological innovation capability in industries with export sophistication.Thus,level of infrastructure of region has a significant positive effect on regional technological innovation capability in regions with export sophistication.Finally,high level of infrastructure of region has a significant positive effect on regional technological innovation capability in industries with export sophistication，It is more importmant that high level of infrastructure of region has a significant positive effect on high technological industry technological innovation capability.Thus,it contributes to the improvement of export trade structure and the enhancement of export technical sophistication.

Keywords: infrastructure;import-export trade;trade structure; technical sophistication; technological innovation ability