| China's rapid economic development is accompanied by the problem of high energy consumption and high environmental pollution emission.Energy conservation and emission reduction is an effective way to solve this development dilemma.As the key and optimized development region of the main function area,urban agglomeration will be an important power source for leading the high-quality economic development in the future.Among them,the Beijing-Tianjin-Hebei,Yangtze River Delta and Pearl River Delta urban agglomerations are located in the economically developed regions of northern,eastern and southern China respectively,which are important carriers of China's regional economic development.At the same time,these three urban agglomerations are also the most mature and competitive urban agglomerations in China,with strong regional representation.Therefore,this study takes the Beijing-Tianjin-Hebei,Yangtze River Delta and Pearl River Delta urban agglomerations as research objects,and studies the following four questions: calculation of energy conservation and emission reduction efficiency,dynamic characteristics and potential of energy conservation and emission reduction efficiency,spatial effect and treatment of energy conservation and emission reduction efficiency,spatial econometric analysis of influencing factors of energy conservation and emission reduction efficiency.The specific research contents and main conclusions are as follows:(1)Based on the evaluation index system of energy conservation and emission reduction efficiency considering environmental benefits,the dissertation measures energy conservation and emission reduction efficiency of 49 cities in China's three major urban agglomerations from 2006 to 2018 by using the Super-SBM model considering undesirable outputs,and their overall characteristics and development characteristics are analyzed in depth.The results indicate that: Firstly,the energy conservation and emission reduction efficiency considering environmental benefits is significantly higher than that without considering environmental benefits in three major urban agglomerations.There exist significant differences in the variation trend of energy conservation and emission reduction efficiency,the number of effective units,the efficiency value and the ranking of efficiency in each city among China's three major urban agglomerations.Secondly,in the case of considering the environmental benefits,the energy conservation and emission reduction efficiency in three major urban agglomerations is generally at a low level and three major urban agglomerations presents the development pattern of “Pearl River Delta > Yangtze River Delta> Beijing-Tianjin-Hebei”.Thirdly,the energy conservation saving and emission reduction efficiency of China's three major urban agglomerations has generally experienced three stages: rapid growth,development adjustment and steady growth.(2)The dissertation analyzes the dynamic characteristic and internal driving factors of energy conservation and emission reduction efficiency by using the GML index model in China's three major urban agglomerations.Then,the dissertation estimates the energy conservation and emission reduction potential by adopting the energy conservation and emission reduction potential model.Finally,the implementation path of energy conservation and emission reduction of each city is proposed.The results indicate that: Firstly,the total factor productivity shows a fluctuating upward trend in China's three major urban agglomerations,among which technological progress is the main factor promoting its improvement.Secondly,the energy conservation potential and emission reduction potential of China's three major urban agglomerations are at a high level on the whole,and the emission reduction potential is far greater than the energy saving potential.Among them,the Beijing-Tianjin-Hebei urban agglomeration is facing the dual pressure of energy conservation and emission reduction,the Yangtze River Delta urban agglomeration is under greater pressure of emission reduction,and the Pearl River Delta urban agglomeration is in an excellent state of energy conservation and emission reduction.Thirdly,49 cities of three urban agglomerations are located in regions A,B,C,and D in the state matrix.Cities in region A are highly efficient cities.Cities in region B and C can adopt the unilateral breakthrough implementation path,while cities in region D can choose two kinds of implementation path,namely the gradual model and the leap model.(3)The dissertation quantitatively characterizes the spatial effects of energy conservation and emission reduction efficiency in China's three major urban agglomerations by using the exploratory spatial data analysis.Then,the dissertation analyzes the spatial distribution characteristics of energy conservation and emission reduction efficiency through LISA cluster diagram.Finally,the spatial governance model of energy conservation and emission reduction in each city is proposed.The results indicate that: Firstly,the global Moran's I index of energy conservation and emission reduction efficiency in three urban agglomerations is significantly different.Among them,the energy conservation and emission reduction efficiency of the Beijing-Tianjin-Hebei and Yangtze River Delta urban agglomerations changed from positive spatial correlation to negative spatial correlation,while the Pearl River Delta urban agglomeration always maintains a strong negative spatial correlation during the study period.Secondly,the local Moran's I index of energy conservation and emission reduction efficiency in three urban agglomerations has obvious stage characteristics,and different spatial agglomeration characteristics are presented in each period.Thirdly,there exist significant differences in the spatial distribution characteristics of energy conservation and emission reduction efficiency among three urban agglomerations.The Beijing-Tianjin-Hebe and the Pearl River Delta urban agglomeration shows a spatial distribution pattern of “big difference between the north and the south,severe polarization between the east and the west” and “severe polarization in the north”,respectively.The spatial distribution of the Yangtze River Delta urban agglomeration is closely related to the provinces where the cities are located.Finally,from the perspective of spatial governance model,the three major urban agglomerations can be divided into the following four regions: “core protected area”,“key compensation area”,“strictly governed area”,and “wary differentiation area”.(4)The dissertation analyzes the influencing factors and spatial spillover effects of energy conservation and emission reduction efficiency in China's three major urban agglomerations by using the spatial econometric model from the following aspects:economic development level,industrial structure adjustment,energy structure,urban development level,opening-up degree,and environmental regulation.The results indicate that: Firstly,the environmental Kuznets curve theory has been verified in the Yangtze River Delta and Pearl River Delta urban agglomerations.Secondly,the energy conservation and emission reduction efficiency in the Beijing-Tianjin-Hebei urban agglomeration is mainly affected by industrial structure adjustment,energy structure,and urban size.Also,urban size and environmental regulation have significant spatial spillover effect in the Beijing-Tianjin-Hebei urban agglomeration.Thirdly,the urbanization rate,energy structure,urban size and opening-up degree have a significant impact on energy conservation and emission reduction efficiency of the Yangtze River Delta urban agglomeration.The adjustment of energy structure,industrial structure adjustment,and urban size have a significant spatial spillover effect.Finally,the energy conservation and emission reduction efficiency in the Pearl River Delta urban agglomeration is mainly affected by energy structure and urban size,among which the urban size has a significant spatial spillover effect on energy conservation and emission reduction efficiency.According to the above conclusions and the development characteristics of each urban agglomeration,relevant policy recommendations have been put forward to improve the energy conservation and emission reduction efficiency in China's three major urban agglomerations. |
PDF Full Text Request