基于两阶段DEA的高新技术企业技术创新效率研究

科技创新能力是实施国家战略的支持力量，高新技术企业作为技术创新的内在推动力，对国家发展具有重大意义。以时滞效应为前提，应用动态两阶段DEA模型，将创新活动分为技术研发和成果转化两个阶段，构建两阶段创新投入产出指标体系，测度中国19个副省级及以上城市高新技术企业2016—2019年的技术创新效率。结果表明：19个副省级及以上城市的高新技术企业技术创新效率存在显著差异，且整体效率偏低；大部分城市存在重视技术研发而忽视成果转化的问题；研发阶段主要依赖规模经济效益，转化阶段纯技术效率的贡献率相对较高；大部分企业的创新效率有待提高。研究成果为不同地区的高新技术企业技术创新活动提供了新角度。

Research on Technological Innovation Efficiency of High-tech Enterprises Based on Two-stage DEA Model

Scientific and technological innovation ability is the supporting force for the implementation of national strategy. As the internal driving force of technological innovation, high-tech enterprises are of great significance to national development. On the premise of time lag effect, the dynamic Two-stage DEA model is applied to divide innovation activities into two stages: technology R & D and achievement transformation, and a two-stage innovation input-output index system is built to measure the technological innovation efficiency of high-tech enterprises in 19 sub provincial and above cities in China from 2016 to 2019.The results shows that there are striking contrasts in the technological innovation efficiency of high-tech enterprises between 19 sub-provincial and above cities, and the overall efficiency is low. Moreover, most cities pay more attention to technological R & D rather than the transformation of technological achievements. The R & D stage mainly depends on economies of scale, the contribution rate of pure technical efficiency in the transformation stage is relatively high, and the innovation efficiency of most enterprises needs to be improved. The results could provide a new perspective for the technological innovation activities of high-tech enterprises in different regions.