The construction of smart cities has promoted the process of urbanization and sustainable urban sprawl, which may accelerate regional coordination by enhancing the spatial correlation among the cities. Firstly, this paper built the mechanism for the impact of urban sprawl and smart city construction on regional coordination and adopted the corrected night light data as the index of economic measurement, using the dynamic fixed effect spatial Dubin model to test theoretical mechanism. It is found that urban sprawl has strongly promoted the regional coordination, which is especially obvious among the neighboring cities. However, the construction of smart cities is not conducive to regional coordination, only when interacting with urban sprawl. The results of robustness check and endogenous treatment are consistent with the baseline regression. Further research shows that urban sprawl restricts the positive effect of industrial agglomeration but could promote economic growth and regional coordination through smart city construction. The policy enlightenment lies in that smart city construction should be promoted, so as to improve economic growth, and smart city network and urban sprawl should be synchronously promoted to accelerate regional coordination.

中文翻译：

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城市扩张与智慧城市建设对区域协调的影响

智慧城市的建设促进了城市化和可持续城市扩张的进程，可通过增强城市之间的空间相关性来加速区域协调。首先，建立了城市无序扩张和智慧城市建设对区域协调的影响机制，并采用修正后的夜灯数据作为经济计量的指标，并利用动态固定效应空间杜宾模型对理论机理进行了检验。发现城市扩张极大地促进了区域协调，在邻近城市中尤为明显。但是，智慧城市的建设仅在与城市蔓延互动时，不利于区域协调。健壮性检查和内源性治疗的结果与基线回归一致。进一步的研究表明，城市扩张限制了工业集聚的积极作用，但可以通过建设智慧城市来促进经济增长和区域协调。政策启示是，要推进智慧城市建设，促进经济增长，同步推进智慧城市网络和城市扩张，加快区域协调。