长江经济带城市绿色创新效率的空间网络关联特征与形成机理研究

Spatial network correlation characteristics and formation mechanism of urban green innovation efficiency in the Yangtze River Economic Belt

摘要:

采用超效率EBM模型对2013 － 2019年长江经济带36个城市的绿色创新效率进行测度，通过构建修正引力模型得到城市间绿色创新效率的空间关联矩阵，运用社会网络分析法和QAP分析法从网络化视角探索长江经济带城市绿色创新效率的空间网络关联特征和形成机理。研究表明：①研究期间长江经济带城市绿色创新效率空间关联强度处于下降趋势，等级结构特征比较明显；②长江经济带下游城市在空间网络中处于相对中心的位置，而中上游城市处于相对劣势地位。③长江经济带城市绿色创新效率集聚板块特征：板块内集聚，板块之间存在一定空间关联。④城市环保、科研投入差异有利于长江经济带城市绿色创新效率空间网络的形成，城市距离、开放、创新水平差异则对其有负向影响。

Abstract:

Using urban panel data from 2013 to 2019 and EBM super efficiency model，green innovation efficiency of 36 cities in the Yangtze River Economic Belt was measured．Also，the modified gravity model was introduced to construct the spatial correlation matrix of urban green innovation efficiency．Then，social network analysis theory was used to delve into the linked characters and formation mechanism of urban green innovation efficiency spatial network in the Yangtze River Economic Belt．The results show that: (1) During the study period, the spatial correlation intensity of green innovation efficiency in cities of the Yangtze River Economic belt is in a downward trend，and the hierarchical structure characteristics are relatively obvious; (2) Cites lower down the Yangtze River economic belt are at the relative center of the spatial network，while the upper and middle reaches are at a relative disadvantage; (3) Urban green innovation efficiency agglomeration plates of Yangtze River Economic Belt present the characteristics of groups of concentration and connection between different plates to some extent; (4) The difference in urban environmental protection and scientific research investment are conducive to the formation of the spatial network of green innovation efficiency in the Yangtze River Economic belt，while the difference in urban distance，openness and innovation level have a negative impact on it．