R&D Investment and Knowledge Productivity of China's Industry

本文运用中国工业33个行业13年面板数据(2001—2013年),先计算了R&D投入,然后构建和估计知识生产函数及分析影响因素。得到结论:在知识生产函数中,R&D资本弹性大于人员弹性,资本大于人员的作用,知识生产具有规模报酬不变和阶段性递增的特征;企业规模大小对知识生产没有显著影响,绩效对专利生产效率的影响具有不显著性的负影响,而在新产品生产函数中,绩效对新产品效率具有正影响;国有产权利用不同的指标(国有产值比重和国有固定资产比重),两个指标对新产品生产函数均具有负效应,而国有产值比重对专利生产函数具有负效应,国有固定资产比重对专利生产具有正效应。This paper investigates the properties of the knowledge production function and the determinants of the R&D efficiency by using a panel data of 33 Chinese industries( 2001—2012),based on measuring R&D capital stock. In order to get the R&D capital investment amount,the R&D investment is divided into capital investment and staff input. And then it builds and estimates knowledge production function. Finally,it analyzes the determinant factors. The conclusions are as follows. First,in the knowledge production function,the elasticity of R&D capital is greater than that of human investment,and the knowledge production has the property of constant returns to scale and phase incremental features. Second,firm size has no significant effect on the production of knowledge. The performance in some cases has a positive impact,and its impact on patent productivity performance has not significantly negative impact. While in the new product function,performance has a positive impact on the efficiency of the new product function. Lastly,the paper uses two different indicators of state-owned property( the proportion of the output value of state-owned and state-owned fixed assets ratio),which have negative effects on the new products function,while the proportion of the output value of state-owned has a negative effect on patent production function,and the proportion of state-owned fixed assets has a positive effect on patent production.教育部人文社会科学重点研究基地重大项目“经济增长与区域经济差异”(13JJD790025