我国不同地区“环境库兹涅茨曲线”假说的检验

The verification of hypothesis about environmental Kuznets Curve based on different regions in China

中国区域经济发展的不平衡导致不同地区环境库兹涅茨曲线也存在较大的差异。本文采用1998-2008年我国30个省市自治区的人均工业废水排放量、人均工业废气排放量与人均工业固体废弃物产生量对我国东部与中西部进行环境库兹涅茨曲线(EKC)检验。结果发现,仅有东部地区的这三项指标与人均收入成倒"U"的关系,而EKC在我国的中西部地区并不存在,中西部地区不同污染物的收入-污染曲线分别呈现"U"型或线性关系。从回归结果上来看,中西部的污染加剧速度要快于东部。外商投资的流入已经使东部的环境污染问题产生好转,但在中西部还未看到这个迹象。

The regional economic development in China is unbalance, which leads to the difference of Environmental Kuznets Curve （EKC）. The hypothesis of EKC is verified by adopting the panel data of industrial wastewater emissions, industrial gas waste emissions, and industrial solid waste emissions from 30 provinces and autonomous regions during the period of 1998 to 2008. The findings indicate that the hypothesis of EKC only exists in eastern region of China, where the indicators of ＂industrial three wastes＂ have an inverted ＂U＂ shape relationship with the per capita ineome. The hypothesis of EKC does not exist in Middle West region of China, where the indicators of ＂industrial three wastes＂ have a ＂U＂ shape or linear relationship with the per capita income. Furthermore, from the point of view of regression results, the development speed of environment pollution in central and western area of China is faster than that in eastern region of China. The environment pollutions in eastern region of China have been improved due to Foreign Direct Investment（FDI） inflow, however there is no such an obvious sign in the Middle West region of China.