Many experts inside and outside china ( such as wei houkai 1997 , cai fang 2000 , liu xiaming , wei yingqi 2004 ) have made a lot of analysis and study on the question whether the economic development distance between eastern china and western china has been lengthened or narrowed 国内外的许多学者对我国东中西部地区之间经济发展的收敛还是发散问题做了大量的实证分析研究,虽然在总体趋势上存在一定的争议,但基本上都认同以90年为分界线我国地区之间的经济发展由收敛走向发散。