基于网络DEA改进模型的长三角机场效率研究

Analysis of Airport Efficiency in the Yangtze River Delta Based on an Improved Network DEA Model

为了研究长三角机场运营效率现状并为未来如何提高效率提供理论指导,本文将非增中间变量从中间变量中分离出来,构建了具有非增中间变量的网络DEA改进模型.同时本文基于非径向非导向视角,在规模报酬可变假设下,将机场运营分为规划投入阶段和生产服务阶段,设定单位收益下的成本为非增中间变量,测算了2010年长三角16家主要机场整体运营效率、规划投入效率与生产服务效率.研究结果表明,与传统DEA和自由中间变量的网络DEA模型相比,具有非增中间变量网络DEA模型更具合理性.最后,基于对新建、改扩建机场和已建机场效率及各变量松弛量分析,提出了针对性的机场效率改善建议.

In order to investigate the status quo of efficiency of airports in the Yangtze River Delta,and provide a theoretical guidance in improving efficiency in the future,the non-increasing intermediate variables are separated from the intermediate variables.An improved network SBM-DEA model is constructed with non-increasing intermediate variables.By setting the cost of unit revenue as an intermediate variable,from the non-radial and non-oriented perspective,this paper analyzes the airport operation from two stages,namely,planning stage and production stage on the assumption of variable returns to scale.It also calculates the overall operational efficiency,planning efficiency and production efficiency of the main airports in Yangtze River Delta in 2010.The results show that the network DEA model with non-increasing intermediate variables is more reasonable than either a traditional DEA model or a free intermediate variable network DEA model.Furthermore,concerning a newly-built airport or a reconstructed airport and an already-existing airport,their respective efficiency and slacks of all variables are measured,and specific opinions and suggestions are provided for improvement.