| The importance of FDI to high-tech industry increment has been widely recognized by governments and scholars. However, foreign investment has some positive and negative aspects, which includes whether FDI generates technology spillover effect to domestic-funded and high-tech enterprises, whether FDI can improve the independent R&D ability of domestic enterprise. All conclusions to these problems are not yet very clear so far; especially the conduct mechanism and influence path between FDI technology spillover mechanism and relevant factors has not been reorganized and researched concretely and thoroughly. Therefore, the empirical research to the improvement function, spillover effect and influence mechanism of FDI to independent R&D ability has important theoretical and practical significance, which helps to analyze and constitute the current policy of independent R&D and foreign investment import, ensure the continuous improvement of R&D ability of domestic enterprise, contribute to the conversion of domestic enterprise from the technology-importing phase to the independent innovation phase. At first, this paper points out that independent innovation is the main content and advanced developed phase of technology innovation through differentiating and analyzing the meaning of technology innovation and independent innovation. Meantime, it also introduces the vertical time sequence analysis and horizontal system comparisons and evaluations of high-tech industry's independent innovation ability based on two factors such as patent application and R&D expenditure.Secondly, this paper also presents the use of econometrics methods, which include some time sequence methods such as Granger Test of Causality, and investigates the patent application dynamically. Then the conclusion is reached, which indicates there has Granger relationship between the patent application, R&D expenditure and foreign investment.Thirdly, this paper brings forward the theoretical framework of how FDI influences the independent innovation through the analysis of Tan wan micro-electronics industry case. At last, is also conducts the empirical research based on panel data of high-tech industry from 1995 to 2004.This paper get lots of valuable result: Not only the entrance degree of foreign investment but demonstration effect of foreign enterprise's R&D is the main factor that influence independent R&D ability of domestic enterprise. FDI promotes the treatment and innovation efficiency of R&D personnel in domestic-funded enterprise through competition effect and demonstration effect, and promotes the independent innovation ability of domestic-funded enterprise. Although so is the fact, the effect does not surpass the process of independent effort. The influence of foreign enterprise R&D to other-owned enterprise exceeds domestic enterprises, because there are kinds of possession system in domestic enterprises, and there exists the difference between them in the motivation and efficiency of technology innovation. Non state-owned enterprises have higher technological efficiency compared with state-owned enterprises.Finally, aiming at the analysis of obstacle factor in independent innovation of high-tech industry, this paper also suggests the five-level evaluation system of high-tech enterprise which helps to promote FDI technology spillover, enhance the independent innovation ability, improve the investment-attracting policy of high-tech industry, and achieve comprehensive and systematic management of high-tech industry.Main creative points in this paper lie as following:(1) It enhances the comprehensive comprehension to the meaning of independent innovation, which does not indicate conduct R&D activities only by own efforts, and should include the all technological activities of actively seeking required technology from academy, university and other enterprises( including foreign enterprises ) and acquiring the knowledge property right through purchase, cooperation, delegation and other legal activities.(2) Granger Test of Causality, which is better than regression analyze,is used in the study of relations between the FDI and the independent innovation of domestic-funded enterprise, which overcomes the pseudo- regression phenomena of the variables, and draws the conclusion that there exists the quantitative relationship with very higher reliability between FDI and independent innovation based on the analysis of the patent application and R&D expenditure.(3) It imports two factors including the foreign-funded enterprise R&D expenditure and personnel average labor expense, analyzes the two factors'importance to FDI-importing mechanism, investigates the conduction mechanism and influence path between FDI technology spillover and its influencing factor. Not the degree of importing foreign investment but R&D expenditure of foreign investment is the important factor which influences the independent innovation ability of high-tech industry.(4) It brings forward the five-level recognition system which helps to promote FDI technology spillover, enhance the independent innovation ability, and is a total solution for enhancing the abilities of high-tech industry's independent innovation and improving the policy of importing investment.
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