本文以11个城市群规划的颁布作为一项准自然实验，采用多期双重差分法，从创新视角考察城市群的经济效应。结果显示：（1）城市群规划的实施对城市群的区域创新活动具有正向推动作用。（2）原先集群程度和一体化程度越高、内部技术水平越接近的城市群收益越大；相比较大城市和中心城市，非中心城市和规模越小的城市在城市群规划实施后创新活动的增长更明显。（3）这其中的作用机制在于城市群规划能够引导地方政府积极合作，打破物理边界，寻求区域创新合作，促进内部一体化程度加深。
Abstract
With the increasingly close economic cooperation between regions in China, the cluster model of urban agglomeration has become a trend, and urban agglomeration has become an important source of regional economic growth. However, in the process of the rapid development of urban agglomerations in China, there are huge difficulties in coordinated development. The introduction of urban agglomerations planning aims to promote the effective cooperation of local governments through corresponding policy design and arrangement, and then realize the "economic effect of urban agglomerations".
Based on this, this paper takes 11 urban agglomerations as the research object, and uses the method of periodic DID to study the driving effect of urban agglomerations planning on the "economic effect of urban agglomerations" from the perspective of innovation, and reveals the heterogeneity and integration mechanism.
Some conclusions as follows: (1) The implementation of urban agglomeration planning can significantly promote the improvement of regional innovation capacity, and the role of cross provincial urban agglomeration planning is more obvious. (2) The implementation of urban agglomeration planning has heterogeneity in promoting regional innovation activities. Firstly, the difference of urban agglomeration itself is manifested. The higher the degree of original cluster and integration, and the closer the level of internal technology, the greater the improvement of the innovation ability of urban agglomeration after the implementation of planning; Secondly, compared with big cities and centers cities, middle and smaller cities will see faster growth of innovation activities after the implementation of urban agglomeration planning. (3) The mechanism of the implementation of urban agglomeration planning on the promotion of regional innovation ability is that the "baton" effect of urban agglomeration planning can lead local governments to actively cooperate and attach great importance, which can further promote the level of regional integration.
According to the above conclusions, this paper has very obvious policy implications. First of all, it is necessary to set up a high-level regional innovation collaborative management and decision-making body to break the interest barriers and policy barriers. Second, we should establish a cross regional mechanism for sharing achievements and benefits, and fully mobilize the enthusiasm of scientific and technological cooperation between local governments and the whole society. Third, promoting the integration of innovation chain and industrial chain, and accelerating the spatial spillover of frontier technology. Fourth, to strengthen the collaborative division of labor between large cities and small and medium-sized cities within the urban agglomeration to form complementary space.
关键词
城市群规划 /
创新产出 /
一体化程度
Key words
urban agglomeration planning /
innovation output /
degree of integration
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基金
国家自然科学基金青年项目：“环境友好型技术进步的实现路径：正式与非正式性环境规制的视角”（71503120，2016.08—2019.12）；教育部人文社科项目：“高质量发展下经济韧性的测度与驱动因素识别研究”（20YJA790077，2020.02—2022.12）。
