The Temporal and Spatial Change of Economic Development at County Level in Shandong Province
基于山东省109个县1990-2008年数据，用因子分析法构建经济实力评价指标，发现各县经济实力提升但差异先扩大后缩小，空间上呈东高西低格局，低水平贫困陷阱集中在省际边界。
Regional economic disparity has long been an interesting topic of academic research on regional development economics in every country.Based on economic development statistic data of 109 counties in Shandong province in 1990~2008,this paper selects 15 economic indicators,and constructs index system to evaluate the county economic strength by using factor analysis method,and carries out a preliminary study on spatial-temporal pattern of the county level economies.Some conclusions of this study are summarized as follows:(1) Economic strength has been improved in all counties during 1990 and 2008,and the total economic disparities of county level in Shandong province have enlarged then decreased.(2) The economic development index has a strong spatial autocorrelation and the regional economic difference will increase in the future.The economic formation in Shandong province is peaks and two valleys from east to west,and the economic strength of districts is stronger than that of surrounding counties;There is extreme disparity of the regional economic development at county level,and the counties with higher economic index are clustered in eastern and central Shandong province while the counties with lower economic index are concentrated in western and southern part.The low-level and low-growth poverty trap assemble areas appear in the boundary of Shandong province,Hebei province,Henan province,Jiangsu province and Anhui province.