基于DEA博弈交叉效率—SDM模型的江苏省沿江八市港口效率研究

Port Efficiency of Eight Cities along the Yangtze River in Jiangsu Province Based on DEA Game Cross Efficiency—SDM model

江苏省沿江八市港口是长三角地区的重要运输节点,其港口效率的高低具有重要的研究意义。依据港口背景及数据统计情况,通过因子分析法得出经济投入、基础设施建设和联运设施建设3个投入指标;再运用DEA博弈交叉效率模型对港口效率进行测度,并分析其时空特征;最后运用空间杜宾模型对港口效率与影响因素之间的空间效应做进一步分析。效率测度研究结果表明:2012-2019年江苏省沿江八市的港口效率值在时间上呈现波动发展,总体呈上升趋势;在空间上呈现中间高,两边低的特性。由全局空间自相关分析得出:港口效率存在显著的空间负相关性。由空间杜宾模型分析结果表明:沿江八市港口效率与经济资源投入及联运设施建设呈正相关,与港口基础设施及周边港口效率呈负相关。

The eight cities along the Yangtze River in Jiangsu province are important transportation nodes in the Yangtze River Delta,and their port efficiency has important research significance.According to the port background and data statistics,the factor analysis method was used to obtain three input indicators,including economic input,infrastructure construction and intermodal facility construction.And then the DEA game cross efficiency model was used to measure the port efficiency and analyze its space-time characteristics.Finally,spatial Durbin model(SDM)was used to furtherly analyze the spatial effect between port efficiency and influencing factors.The efficiency measurement research results show that the efficiency values of the eight ports along the Yangtze River in Jiangsu province from 2012 to 2019 fluctuate in time,with an overall upward trend;spatially,they are high in the middle and low on both sides.Global spatial autocorrelation analysis shows that the port efficiency has a significantly negative spatial correlation.The SDM analysis results show that the port efficiency of the eight cities along the river is positively correlated with the input of economic resources and the construction of intermodal facilities,and negatively correlated with the port infrastructure and the efficiency of surrounding ports.