4ANG B W.Decomposition analysis for policy making in ener- gy: which is preferred method? [J]. Energy Policy, 2004,32 (9) :1131-1139.
5DE BRUYN S M. Explaining the environmental Kuznets curve: structural change and international agreements in reducing sul- phur emissions[J].Environment and Development Economies, 1997,2(4) ;485-503.
6STERN D I.Explaining changes in global sulfur emissions:an econometric decomposition approach[J]. Ecological Econom- ics, 2002,42 (2) : 201-220.