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• A distribution dynamics approach is employed to examine the converge of TFEE across Chinese PAA level cities. • The findings show a clear convergence in TFEE. • Convergence comes more from efficiency drops in high TFEE cities than from efficiency gains in low TFEE cities. • The environmental protection polices in key cities improved energy efficiency. • Large-sized cities show better performance in energy efficiency than small- and medium-sized cities. Improving energy efficiency is considered the most direct route to reducing carbon emissions on a massive scale. To examine the long-run trend of China's energy efficiency, this paper employs a distribution dynamics approach to analyze the convergence of total-factor energy efficiency (TFEE) across 286 Chinese cities between 2002 and 2014. The result suggests the existence of convergence, which comes more from the efficiency declines in the high TFEE cities rather than the efficiency gains in the low TFEE cities. Despite the fact that a few cities have performed well in energy efficiency, the majority of cities have converged to a low-efficiency point. Further analyses show that the inefficiency was attributed to inefficient energy use in small- and medium-sized cities. Our analysis provides strong scientific support for China's ongoing energy conservation and environmental protection policies. [ABSTRACT FROM AUTHOR]

In spite of its rapid economic development, China is faced with serious issues of resource shortage and environmental pollution. This paper is aimed at exploring the issues of resource shortage and environmental pollution in Chinese cities by means of efficiency evaluation. Through the Super-efficiency general directional distance function (GDDF) model, this paper calculates the urban efficiencies of resource-saving (UERS) of 197 Chinese cities from 2011 to 2015. Furthermore, considering the environmental problems, it applies the Super-efficiency GDDF model with undesirable outputs, and accesses the urban efficiencies containing environmental factors (UEEF). The empirical results are listed as follows. (1) Most of the Chinese cities exhibited comparatively low UERS and UEEF, indicating great potential for the reduction of resource consumption and environmental pollution; (2) Those groups with higher levels of resource-saving efficiency tend to have poorer environmental efficiency. This means that many cities achieve good economic performance at the expense of the environment; (3) In order to realize the sustainable economic and social development, we should not only save resources, but also reduce the emission of pollutants. [ABSTRACT FROM AUTHOR]