大城市更有利于创新吗?

Are Big Cities More Conducive to Innovation?

基于2003—2017年中国277个地级及以上城市的面板数据,分析城市规模及其空间互动对城市创新产出的影响效应。研究结果包括:第一,全样本的估计结果显示,随着城市规模持续扩大,城市创新能力不断提升,但是该正向作用会受到城市所处地区和资源禀赋的约束;第二,作用机制检验结果表明,更大的市场需求规模与更高的金融集聚水平是大城市拥有更多创新产出的重要路径;第三,从空间溢出效应视角分析后发现,城市创新的空间集聚特征呈现正的显著性,同时当城市的规模越大时,其对周边城市创新的抑制效应就更为强烈。

Based on the panel data of 277 prefecture-level cities and above in China from 2003 to 2017,this paper analyzes the effect of urban scale and spatial interaction on the urban innovation.The study found that:First,the full sample estimation results show that as the size of the city continues to expand,the urban innovation capacity continues to increase,but this positive effect will be constrained by the city's location and resource endowment.Second,the results of the mediation effect model show that a larger market demand scale and a higher level of financial agglomeration are important paths for large cities to have more innovation output.Third,from the perspective of spatial spillover effects,this paper found that the spatial agglomeration characteristics of urban innovation are positively significant.At the same time,as the scale of a city becomes larger,its inhibitory effect on surrounding urban innovation becomes more intense.