产业集聚对城市绿色效率的影响——以长江经济带108个城市为例

Research on the influence of industrial agglomeration on urban green development: evidence from 108 cities based on the Yangtze River Economic Belt

基于长江经济带108个地级及以上城市的面板数据,运用包含非期望产出的SBM模型通过Matlab2016测算了各城市的绿色效率值,并利用Tobit模型实证检验了不同产业集聚对城市绿色效率的差异性影响。结果显示:就长江经济带整体而言,城市绿色效率值有所下降,区域发展不平衡;在产业集聚双重效应的共同作用下,产业集聚对城市绿色效率的影响并非单调递增或递减,其影响作用在不同产业存在差异;制造业集聚与城市绿色效率之间呈U型关系,云南、贵州、湖南、江西及安徽等地目前仍处在U型曲线的左下侧区域;服务业集聚对城市绿色效率的提升具有显著的促进作用。

With the panel data of 108 prefecture level and above cities of the Yangtze River Economic Belt area, based on the SBM Model with undesirable outputs by Matlab2016, this essay estimates the urban green efficiency value, and uses the Tobit Model to test different effect of industrial agglomeration differences on urban green efficiency. The results show that： In the overall Yangtze River Economic Belt, the urban green effi- ciency is decreasing and the regional development is misbalancing; With the dual influences of industrial agglomeration, the re- lationship between the two is not monotone increasing （decreasing） , the influence of its role in different industries vary ; There is a U -shaped relationship between manufacturing industry agglomeration and urban green efficiency, and now Yunnan, Guizhou, Hunan, Jiangxi, and Anhui and other provinces are still in the lower left side of the U - shaped area; The service industry agglomeration is significant to promote the urban green efficiency.