Abstract:
Considering the pollution as unexpected output, the environment effect of regional integration and its theoretical mechanism is discussed under a framework of extended growth convergence. Based on the data of the Yangtze River Delta urban agglomeration and the Pearl River Delta urban agglomeration form 2003 to 2014, this paper constructs a new method to measure regional integration, uses instrumental variable and difference-in-differences methods to estimate the effect of inter-provincial and within-provincial urban integration on the convergence of pollutants emission intensity. The results show that regional integration significantly promotes the convergence of emission intensity and reduces emission, with a more apparent role in reducing emission in recent years. The emission intensity shows conditional convergence.Economic growth convergence is an important reason for the emission convergence. The results imply that China should make full use of the double advantages of regional integration-regional coordinated development and the emission reduction, and further promote regional and urban integration, develop the economy of urban agglomeration, construct the development pattern of mutually symbiosis among cities, and realize emission reduction finally.
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