1Grossman,G.M,Krueger,A.B. Environmental impacts of a north American free trade agreement[National Bureau Economic Research Working Paper 3914][R].NBER,Cambridge MA,1991.
2Panayotou,T. Empirical tests and policy analysis of envi-ronmental degradation at different stages of economic de-velopment[R].1993.
3Ang,B.W,Zhang,F.Q,Choi,K.H. Factorizing chan-ges in energy and environmental indicators through de-composition[J].{H}ENERGY,1998,(6):489-495.
4Ma,C,Stern,D.I. China's carbon emissions 1971-2003[R].Rensselaer Working Papers in Economics,2007.