延安市区域经济差异演变的空间分析

在作者以往对延安区域经济差异研究基础上,以人均国内生产总值为测度区域经济差异的变量指标,采用泰尔指数和基尼系数进一步定量分析了延安市自1952年以来区域经济差异演变与空间变化特征;引用国外的区域分离系数等方法,分析了延安市经济增长与区域差异空间格局的相互关系。研究结果表明:1)延安区域经济总差异在过去50年里呈现出扩大的趋势,但在不同时期差异变化的幅度不同。根据国际上对基尼系数的警示通行标准,延安区域经济差异已经超过警戒状态。2)延安市区域经济差异是区间差异和区内差异均不断扩大的结果。20世纪80年代中期以后,区间差异已经占据主导地位,成为延安区域经济差异不断扩大的主要驱动力。3)区域分离系数计算表明延安区域逐渐分离趋异。相关分析进一步表明经济增长与区域差异的空间变化有十分显著的相关关系,县域经济增长的不平衡性导致了区域发散或收敛,从而整体上推动了延安区域经济差异的变化趋势。

Spatial Analysis of Evloution of Regional Economic Inequality in Yan'an City

The primary objective of this study is to illustrate the relationship between spatial inequality and regional economic growth in Yan'an city.A set of methodologies of regional economic inequality and a measure of separation between groups of regions were explained using long time(from 1952 to 2005) data of Gross Domestic Production per capita,by taking 13 counties in Yan'an city as geography study units.By the Gini index and Theil index,it was showed that the regional economic inequality of Yan'an city shifted and kept increasing up trend.The decomposition of Theil index showed the interregional inequality is the main driving force leading to Yan'an regional economic inequality widen.The relationship between regional economic growth and spatial structure varieties in Yan'an city was quantitatively analyzed.To illustrate the trajectories of Yan'an city regional economic inequality determined by county's economic growth,each county' GDP per capita was compared to the regional average corresponding in 1980,1990,2000 and 2005 to see if a county had been converging to the average or diverging from 1980-1990,1990-2000,and 2000-2005.