知识产权示范城市建设提升了城市技术创新能力吗?——基于双重差分与中介效应的实证

Does the Construction of Intellectual Property Model Cities Enhance the Technological Innovation Capability of Cities?——Empirical Study Based on DID and Mediating Effect

从政策工具视角出发,采集了2008-2018年我国35个城市的面板数据,并将其划分为处理组、对照组两个组别,运用双重差分、中介效应等检验方法评估知识产权示范城市建设对城市技术创新能力的影响及作用机制。研究结果表明:(1)知识产权示范城市建设能够显著促进城市技术创新能力,这一结论在稳健性检验中依然成立;(2)知识产权示范城市建设对技术创新能力的促进作用存在异质性,对非实质性技术创新的促进作用高于实质性技术创新;(3)示范城市建设能够通过改善创新环境促进技术创新能力,创新环境在示范城市建设与技术创新能力间发挥部分中介效应。

From the perspective of policy tools,this paper collects panel data of 35cities in China from 2008 to 2018,and divides them into two groups:processing group and control group.Using the DID method and mediating effect,it evaluates the influence and mechanism of intellectual property model cities construction on city's technical innovation ability.Results show that,the construction of intellectual property model cities has significantly promoted the city's technological innovation ability,which is still true in the robustness test.The promotion of intellectual property model cities construction on technological innovation capability is heterogeneous,and the promotion effect on immaterial technological innovation is higher than that on substantive technological innovation.The establishment of intellectual property model cities can promote technological innovation capability by improving the innovation environment,and the innovation environment plays a part of the intermediary effect between the construction of model cities and technological innovation ability.