高铁开通促进了城市绿色创新吗?

Does the Opening of High-speed Rail Facilitate Urban Green Innovation?

高铁作为中国新型交通基础设施,其高效便捷的运输方式对于提升城市经济关联、促进绿色创新具有重要影响。在系统阐述高铁开通与城市绿色创新内在关联逻辑的基础上,基于2008—2019年中国266个城市的面板数据,运用空间杜宾模型检验了高铁开通对城市绿色创新的本地效应及空间溢出效应。结果表明:(1)城市层面绿色创新具有显著的空间相关性,高铁开通为城市绿色创新提供了重要动力,不仅会促进本地城市绿色创新,还会影响邻近城市绿色创新。(2)高铁开通不仅提升了城市绿色创新的绝对水平,也提高了其相对水平;高铁开通对城市绿色创新的空间效应会受到城市规模的调节,城市规模越大,高铁开通对城市绿色创新的作用越明显。(3)高铁开通对城市绿色创新的空间溢出效应有效作用范围为距离本地城市100~250 km半径内,250 km以外则不再明显。上述研究结论为充分发挥高铁开通作用,促进城市经济绿色转型提供了重要依据。

As a new type of transportation infrastructure in China,high-speed rail has an important impact on improving urban economic connection and promoting green innovation with its efficient and convenient mode of transportation.On the basis of systematically illustrating the internal correlation logic between the opening of high-speed rail and urban green innovation,and based on the panel data of 266 Chinese cities from 2008 to 2019,this paper empirically tests the local and spatial spillover effects of high-speed rail opening on urban green innovation by using the spatial Dubin model.There are following findings:(1)There is a significant spatial correlation of green innovation at the urban level.The opening of high-speed rail provides an important impetus for urban green innovation,which not only promotes green innovation in the local cities,but also in neighboring cities;(2)The opening of high-speed rail not only improves the absolute level of urban green innovation,but also improves its relative level.The spatial effect of high-speed rail opening on urban green innovation will be adjusted by city size.The larger the city size is,the more obvious the effect of high-speed rail on urban green innovation will be;(3)The spatial spillover effect of the opening of high-speed rail on urban green innovation is within the radius of 100km to 250km from the local city,but it is no longer obvious beyond 250km.The above research results provide an important basis for giving full play to the role of high-speed rail operation and promoting the green transformation of urban economy.