基于二级嵌套CES生产函数的工业企业创新效度研究 ——基于江苏省电子信息和新材料行业数据

Research on Innovation Validity of Industrial Enterprises by the Two-level Nested CES Production Function: Based on the Electronic Information Industry and New Material Industry of Jiangsu Province

摘要:

在全球创新的浪潮下，创新成为企业发展之要。而目前创新对企业产出的贡献难以计量，所以本文将企业创新给予定量化的指标来解决这一问题。本文以企业拥有有效发明专利数量作为衡量企业创新程度的量值，以技术、R&D资本投入、R&D人力投入作为企业产出的投入要素，对传统的CES生产函数进行改进，构建三种二级嵌套CES生产函数，针对江苏省两大主导产业——电子信息、新材料进行创新效度评估。研究表明，对于电子信息行业，（LS）K嵌套方式的拟合度最好，且该行业更倾向于“开放式创新”的创新模式；对于新材料行业，（SK）L嵌套方式的拟合度最好，且该行业更倾向于“封闭式创新”的创新模式。最终，根据拟合结果并结合行业特征进行综合分析，给出针对性建议。

Abstract:

Under the tendency of global innovation, innovation has become a must of enterprise development. But at present, the contribution of innovation to enterprises’ output is difficult to measure, so this paper gives a quantitative index of enterprise innovation to solve this problem. We construct three types of nested CES production functions to measure the contribution of innovation based on electronic information industry and biomedical industry in Jiangsu, China with three indicators--technology, R&D capital input, and R&D labor, which use the number of effective invention patents to measure enterprise innovation. The result shows that “(LS) K” nesting model has the best fitness for electronic information industry, and it is more inclined to the “open innovation”; “（KS）L” model is fittest for biomedical industry among the three types of models we construct, and it is more inclined to the “closed innovation”. Combining the fitting results with the characteristics of the industry, some feasible proposals are provided eventually.