摘要：
The study on regional economic disparity from different perspectives is helpful to clarify the current situation of re-gional economic disparity and promotes its balanced development. Based on the statistics of 129 cities in the Yangtze River Econo-mic Belt during 2000~2015, this paper analyses the spatial and temporal evaluation of economic disparity, and carries out specific analysis from global, regional, provincial and urban perspectives by the variation coefficient method, further to identify the key ar-eas. The main results are as follows: (1) the overall economic disparity of 129 cities in the Yangtze River Economic Belt increases first and then decreases during the research period, which indicates that the"polarization"feature is obvious. The spatial evolu-tion of the regional economy and regional economic disparities are in the same line, corresponding to a"polarization→proliferation"phenomenon with taking 2010 as the node; (2) from regional perspective, the economic disparity in the upper reaches has in-creased significantly, and the level of economic disparity along the mainstream is always higher than that of no-mainstream during the research period. Economic disparity remain continuously increasing along the upper reaches of the mainstream. From the provin-cial perspective, Sichuan's economic disparity has increased year by year, while that of Yunnan and Guizhou have increased in fluctuation. The other provinces' economic disparity have increased first and then decreased. The economic disparity of Sichuan, Hubei, Hunan, Anhui and Jiangsu are greater. From the urban perspective, economic disparity in mega cities and type II small cities are smaller, and that in the big cities is larger. In 2015, type I small cities have ranked first with the biggest economic dis-parity; (3) the west area of the economic belt, the central and western regions along the Yangtze river, Sichuan, Hubei, Hunan and Anhui provinces, small city (especially type I small city) and medium-sized city are the sensitive areas to promote balanced development of the Yangtze River Economic Belt.%从不同视角解构大区域经济差异,有助于明晰区域经济差异的真实现状,有重点地推进经济均衡发展.本文基于长江经济带129个地级市2000年、2005年、2010年、2015年的统计数据,采用综合指数法评价长江经济带经济发展水平,并按尺度递减从全域、区域、省域、城市4个视角,利用探索性空间分析法 (ESDA) 和变异系数法分析了长江经济带经济发展差异,识别出经济差异重点区域.研究发现:(1) 2000~2015年,全域经济差异以2010年为节点先增大后减小,且内部"两极分化"明显,经济空间演化与经济差异时序波动吻合,相应在空间上呈现"极化→扩散"趋势;(2) 研究时段内,从区域差异看,上游地区经济差异增长明显,干流沿线经济差异始终高于外围,上游干流沿线经济差异逐年增大;从省域差异看,苏、浙2省经济发展趋于均衡,川、鄂、湘、皖4省经济差异增长明显,云、贵、赣3省经济差异波动增长;从城市差异看,特大城市和Ⅱ型小城市经济差异较小,Ⅱ型大城市经济差异较大,2015年Ⅰ型小城市经济差异增至最大;(3) 长江经济带西部地区,中西部长江干流沿线,川、鄂、湘、皖4省,Ⅰ型小城市和中等城市是下阶段长江经济带推进经济均衡发展的重点区域.
