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城市群理论上能够通过群内城市之间的市场整合实现资源的优化配置,促进生产效率提升。本文以长三角城市经济协调会这一政府合作机制作为城市群形成的一项准自然实验,基于江苏、浙江和上海131个县市区1993—2010年的数据,运用倍差法检验其是否提高了城市群经济绩效。结果显示,加入长三角城市经济协调会可以使地区劳动生产率显著提高8.9%,且这种效应呈现出随时间逐渐增强的趋势。进一步,我们发现协调会能够显著降低地区间的市场分割。本文结论在相关的稳健性检验之后都仍然成立。
In theory, urban agglomerations can optimize the allocation of resources through the market integration among cities in a group and promote the improvement of production efficiency. Based on the government cooperation mechanism of the Yangtze River Delta Urban Economic Coordination Association as a quasi-natural experiment in urban agglomeration, based on the data of 1993-2010 in 131 counties and cities in Jiangsu, Zhejiang and Shanghai, the paper tests whether it is improved The economic performance of urban agglomerations. The results show that joining the Yangtze River Delta Urban Economic Coordination Association can make a significant increase of 8.9% in labor productivity in the region, and this effect shows a gradual increase over time. Further, we found that the coordination meeting can significantly reduce the market segmentation between regions. The conclusion of this paper still holds after the related robustness test.