Abstract
Efficiency analysis is an important step in the environmental performance evaluation research, especially in the context of the implementation of the Environmental Protection Tax Law in China. In this paper, we first consider regional heterogeneity and divide regions into high, medium, and low-cost groups based on pollution tax levels. Then, we construct a non-convex metafrontier Data Envelopment Analysis (DEA) model that can solve the heterogeneity problem well and measure the environmental efficiency of each region. In addition to considering natural disposability, we further discuss managerial disposability here. The empirical results show the difference between the efficiency and the benchmark test based on the convex or non-convex metafrontier assumption. Besides, middle and low-cost groups are encouraged to increasing environmental protection expenditure under managerial disposability. Finally, we summarize the improvement methods of provincial administrative regions under different tax rates: high-cost groups develop a green environmental economy and control pollution emissions; middle-level groups optimize industrial structure and increase investment in technological innovation; the low-tax groups increase the tax on pollutants and strengthen government control.
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