全国统一大市场建设如何影响城市协同创新？——基于交易成本与要素流动的链式中介作用

How Does the Construction of a Unified National Market Affect Urban Collaborative Innovation?——Based on the Chain Mediating Role of Transaction Costs and Factor Mobility

摘要:

建设全国统一大市场、提升城市协同创新水平是推动经济高质量发展与培育新质生产力的关键举措。文章基于2016—2023年我国266个城市对面板数据,检验全国统一大市场建设对城市协同创新的影响及作用机制。研究发现,全国统一大市场建设显著提升了城市协同创新水平；机制分析表明,全国统一大市场建设主要通过降低交易成本、促进要素跨区域流动来推动城市协同创新,且交易成本与要素流动存在链式中介效应；进一步分析发现,城市群建设可以正向调节全国统一大市场建设对城市协同创新的影响,且在不同发育程度城市群内全国统一大市场建设对城市协同创新的影响存在异质性,在跨类型城市群样本中发展差距适度的组合更易实现高效协同创新。研究为厘清全国统一大市场建设与区域创新协同发展的内在联系提供了经验证据,也为破解区域创新发展瓶颈、提升城市协同创新水平提供决策参考。

Abstract:

Developing a unified national market and enhancing urban collaborative innovation are crucial measures for promoting high-quality economic development and fostering new quality productive forces. Based on panel data of 266 city pairs in China from 2016 to 2023, this paper examines the impact and mechanism of constructing a unified national market on urban collaborative innovation. The results show that the development of a unified national market significantly improves the level of urban collaborative innovation. Mechanism analysis indicates that building a unified national market promotes urban collaborative innovation mainly by reducing transaction costs and facilitating cross-regional flow of production factors, and there exists a chain mediating effect between transaction costs and factor mobility. Further analysis reveals that urban agglomeration development positively moderates the impact of a unified national market on urban collaborative innovation. Moreover, the effect of a unified national market on urban collaborative innovation is heterogeneous across urban agglomerations of different development levels. Combinations with moderate development gaps in cross-type urban agglomerations are more conducive to achieving efficient collaborative innovation. This study provides empirical evidence for clarifying the internal relationship between the construction of a unified national market and coordinated regional innovation development, and also offers decision-making references for breaking through bottlenecks in regional innovation development and elevating urban collaborative innovation.