INCOME STRUCTURE,REGIONAL STRUCTURE AND THE EVOLUTION THE INCOME GAP BETWEEN URBAN RESIDENTS——BASED ON THE DATA IN 2000—2009

Based on the 2000-2009 national income data on urban residents in all provinces,the change scope of the income gap between urban residents is measured according to the Gini coefficient and the Theil index.The results show there is a slight expansion between 2000-2006,but 2006-2009 decline.It is found that economic growth and income inequality are not necessarily consistent,that is,economic growth is not necessarily at the cost of increasing the income gap.Narrowing the income gap is not necessarily at the cost of sacrificing economic growth either.According to Gini coefficient the income gap between urban residents is decomposed to the income structure gap,revealing wage income is the determining factor of the general gap,but its contribution to the general gap is decreasing;so is transfer income.Both have a positive effect on narrowing the gap overall.According to Theil index the income gap between urban disparities is decomposed to the gaps between and within regions,the gap between regions is found to constitute the subject of the general gap,but from the time series perspective,the impact the gap within the regions gradually expand.The eastern regions inter-provincial differences in the income of urban residents have the greatest impact on the gap within regions.