蒙陕甘宁能源“金三角”城市自然资源投入产出效率评价研究

Evaluation of urban natural resources input-output efficiency in“energy golden triangle”region of China

基于水-能源-粮食投入-产出指标体系,运用SBM-DDF模型分析静态截面数据,运用ML指数模型分析动态面板数据,测算2004—2018年蒙陕甘宁能源“金三角”30个城市水-能源-粮食复合系统的投入产出效率,并对要素贡献和构成进行分解。结论表明:蒙陕甘宁地区整体效率值相对稳定在0.65~0.85范围内,其中产出要素效率值平均贡献率达到77%,是整体效率值的主要拉动力。西安、天水、延安、庆阳、包头、呼和浩特、鄂尔多斯代表最佳生产前沿面,黄河上游城市的系统效率亟待提高。TFP指数增长年均值为1.019,整体呈现平缓右偏型W结构,其中技术变化是TFP增长的主要推动力,技术效率对其有制约作用。实现TFP增长的地区明显集中于经济发展较快、资源相对丰富的省会城市和重点城市群。

Based on the water-energy-grain input-output index system,the SBM-DDF model is used to analyze the static cross-section data,and the ML index model is used to analyze the dynamic panel data.The input-output efficiency is calculated for the water-energy-grain complex system in 30 cities of Mongolia,Shaanxi,Gansu and Ningxia from 2004 to 2018,and the contribution and composition of the elements are decomposed.The results show that the overall efficiency is relatively stable in the range of 0.65~0.85,and the average contribution rate of the efficiency value of output factors reaches 77%,which is the main driving force of the overall efficiency value.Xi’an,Tianshui,Yan’an,Qingyang,Baotou,Hohhot and Ordos represent the best production frontier,and the system efficiency of cities in the upper reaches of the Yellow River is in urgent need of improvement.The average annual growth rate of TFP index is 1.019,and the overall TFP shows a gentle right-skewed W structure.Technological change is the main driving force of TFP growth,while technical efficiency has a restrictive effect on it.The regions that realize TFP growth are obviously concentrated in the provincial capitals and key urban agglomerations with fast economic development and relatively rich resources.