摘要
基于2008—2018年中国城市与上市公司匹配的面板数据,以知识产权示范城市建设为准自然实验,采用双重差分法(DID)实证检验知识产权保护对微观企业主体全要素生产率的影响及其作用机制。研究表明,知识产权保护对企业全要素生产率的提高具有显著的促进作用,经过一系列稳健性检验后结论依然成立。从作用机制来看,知识产权保护通过技术创新激励效应、人力资本扩张效应和融资约束缓解效应,进而提升企业全要素生产率。进一步的异质性研究发现,知识产权保护对外资企业、成长期企业以及专利密集型企业具有更加显著的促进作用。为充分发挥知识产权示范城市的政策效应,需要推动试点城市持续扩容,为提高企业全要素生产率强化制度保障;对不同性质、生命周期以及专利密集度的企业实施差异化政策;配套出台人才引进、研发补贴等惠企措施,完善知识产权服务机构建设。
Based on the matched panel data of China's cities and listed companies from 2008—2018,the impact of IPR protection on total factor productivity of micro enterprise subjects and its mechanism of action are empirically tested using difference-in-difference(DID)method in a quasi-natural experiment with the construction of IPR demonstration cities.The study shows that IPR protection has a significant contribution to the improvement of total factor productivity of enterprises,and the conclusion still holds after a series of robustness tests.In terms of the mechanism of action,IPR protection enhances the total factor productivity of firms through technological innovation incentive effect,human capital expansion effect and financing constraint alleviation effect.Further heterogeneity study finds out that IPR protection has more significant policy effects on foreign-owned firms,growth stage firms,and patent-intensive firms.In order to give full play to policy effects of IPR demonstration cities,it is necessary to promote continuous expansion of pilot cities and strengthen the institutional guarantee for improving enterprise total factor productivity,to implement differentiated policies for enterprises with different nature,life cycle and patent intensity,to introduce supporting measures to benefit enterprises such as talent introduction and R&D subsidies,and to improve the construction of IPR service institutions.
作者
刘建江
熊智桥
罗双成
LIU Jianjiang;XIONG Zhiqiao;LUO Shuangcheng(School of Economics and Management, Changsha University of Science and Technology, Changsha 410076, China;School of Economics, Hunan Agricultural University, Changsha 410128, China)
出处
《南京财经大学学报》
CSSCI
2022年第2期1-11,共11页
Journal of Nanjing University of Finance and Economics
基金
国家社会科学基金青年项目“新发展格局下数字技术驱动制造业服务化转型的机理及路径研究”(21CJY041)
湖南省社会科学基金重大项目“双循环新发展格局下的中国制造转型升级研究”(21ZDAJ006)
湖南省“十四五”教育规划重大委托项目“对接‘三高四新’战略的湖南现代产业学院建设研究”(XJK21ZDWT001)。
关键词
知识产权保护
企业全要素生产率
技术创新
人力资本
融资约束
intellectual property protection
total factor productivity of enterprises
technological innovation
human capital
financing constraints
