网络基础设施建设与城市间合作创新——“宽带中国”试点及其推广的证据

《财经研究》 2022年48卷第3期 页码：79 - 93  online：2022年3月2日

网络基础设施建设与城市间合作创新——“宽带中国”试点及其推广的证据

Network Infrastructure Construction and Inter-city Cooperative Innovation: Evidence of the “Broadband China” Pilot Program and Its Spread

作者（中）：种照辉1, 高志红1, 覃成林2

作者（英）：Chong Zhaohui1, Gao Zhihong1, Qin Chenglin2

作者单位：1.汕头大学 商学院，广东 汕头 515063 2.暨南大学 经济学院，广东 广州 510632

摘要：当前中国经济面临构建双循环发展格局和深化创新驱动发展的转型压力。文章利用“宽带中国”战略评估了网络基础设施建设对城市间合作创新的影响，并检验了多批次试点政策的推广效应。研究发现，“宽带中国”战略显著促进了城市间合作创新的发展，平均而言，该战略的实施使试点城市的城市间合作专利数（每万人）提高约0.890个，且该政策具有推广效应。机制检验表明，“宽带中国”战略通过促进城市本地高新技术产业发展，拓展城市间合作创新的空间外延，从而有利于城市间合作创新。异质性检验表明，“宽带中国”战略对东部省份城市和南部省份城市的合作创新影响更大。另外，城市人口规模和城市合作专利类型的不同是导致“宽带中国”战略政策效果产生异质性的原因。文章结论为中国完善网络基础设施建设,深化城市间合作创新，进而加快形成双循环新发展格局提供了政策启示。

关键词：网络基础设施; 城市间合作创新; 双重差分法; 推广效应

Summary: China’s economy is facing the pressure of building a dual-cycle development pattern and deepening innovation-driven development. Since the implementation of the innovation-driven development strategy, China has made great progress in innovation and development, but there is still a certain gap between China and developed countries in key core technologies and original innovation. For China, where the spatial distribution of innovation resources is extremely uneven, inter-city cooperative innovation is the key to carry out cooperative innovation and release innovation potential. In particular, under the background of constructing a new dual-cycle development pattern with domestic cycle as the mainstay and deepening innovation-driven development, promoting inter-city cooperative innovation has important significance for guiding innovation resource cooperation, improving innovation capacity, and promoting domestic innovation cycle.In this context, this paper, for the first time, uses the “Broadband China” strategy to evaluate the impact of network infrastructure construction on inter-city cooperative innovation, and tests the promotion effect of multiple pilot policies. The results show that the “Broadband China” strategy significantly promotes the development of inter-city cooperative innovation. On average, the number of inter-city cooperative patents (per 10,000 people) in pilot cities increases by 0.890, and the policies have a promotion effect. The mechanism test shows that the “Broadband China” strategy is beneficial to the inter-city cooperative innovation by promoting the development of local high-tech industries and expanding the spatial extension of inter-city cooperative innovation. The heterogeneity test shows that the “Broadband China” strategy has a greater impact on the cooperative innovation of cities in eastern and southern provinces. In addition, the difference of urban population size and the type of urban cooperative patent are the reasons for the heterogeneity effect of “Broadband China” strategy.The possible contribution of this paper is mainly reflected in the following three aspects: Firstly, it uses the “Broadband China” strategy to evaluate the impact of network infrastructure construction on inter-city cooperative innovation, which enriches the literature on regional cooperative innovation research at the city level. Secondly, it identifies the promotion effect of pilot policies based on the multiple batches of “Broadband China” strategy pilot policies. This is helpful to correctly understand the demonstration and leading role of the pilot, so as to better drive the reform and promote the implementation of the policies. Thirdly, it innovatively constructs the index of inter-city cooperative innovation distance, and further reveals the mechanism of network infrastructure influencing inter-city cooperative innovation from the two perspectives of “local effect” and “connection effect”.The conclusion of this paper provides policy enlightenment for China to improve network infrastructure construction, deepen inter-city cooperative innovation, and accelerate the formation of a new dual-cycle development pattern. In particular, network infrastructure development needs to consider regional differences and strengthen coordination with relevant innovation policies.

Key words: network infrastructure; inter-city cooperative innovation; DID method; spreading effect

DOI：10.16538/j.cnki.jfe.20211113.402

收稿日期：2021-8-5

基金项目：国家社会科学基金重大项目（19ZDA055）；广东省教育科研项目（2020GXJK213）；教育部人文社会科学规划项目（20YJC790189）；广东省自然科学基金项目（2021A1515011612）

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