A Study On The Impact Of High-tech Industries' Export On The Industry Productivity

Export and productivity is one of the study themes of foreign trade and economic growth. In China, study on this theme is mainly about manufacturing industry, rarely on high-tech industries. The export scale of high-tech industries in our country is extending constantly and it keeps trade surplus from year 2004, however, the processing trade is the main trade mode, foreign enterprises are the main export bodies and the high-tech industries is lack of international competitiveness.This paper takes the technology-intensive and high added-value high-tech industries as the entry point to study the impact of high-tech industries'export on industry productivity. Theoretically, it describes in detail the situation of the high-tech industries. Firstly, define the concept of high-tech industry and then describe the three phases, development characteristics and strengths and weaknesses, and lastly, define the productivity and analyze its factors. In the mechanism analysis section, analyze economics of scale of export and then take examples from the viewpoint of Melitz (2003) "industry productivity is the weighted average of enterprise productivity" to theoretically deduct the resource reallocation effect and technical progress effect based on the firm heterogeneity theory. In the empirical analysis section, firstly, calculate the total factor productivity of the five industry productivity of high-tech industries on basis of the Malmquist index method, and then use panel data model to analyze the relation of the TFP growth rate and the export growth rate, carry out the capital-output ratio model to make regression analysis and then extend Levin & Raut's model with variable R&D investment. The empirical results show that high-tech industries' export has a positive impact on the industry productivity, though the impact is not very high, maybe because 80% of high-tech industries' export is processing trade, and it hasn't yet become the high-added value industry as in advanced countries. However, R&D investment has an obvious impact on the industry productivity. At last, bring forward related policy suggestions based on the theoretical and empirical analysis.