Based on the data of national hi-tech zones between the years of 2000 and 2008, the comprehensive strength index of national hi-tech zones is constructed, and then their polarization level and spatial direction are measured by the polarization index. The study results show that the overall polarization tendency of national hi-tech zone presents characteristics of "M" style in the past six years, and the level strengthens in south-north dimension, weakens in developed cities-less developed cities dimension and in coastal-inland dimension; and the average polarization level in developed cities-less developed cities dimension is strongest, however, the average polarization level in south-north dimension is the weakest. According to the empirical results, cities of Beijing, Xian, Tianjin, Wuhan, Chengdu, Dalian, Changchun, and Shenyang are deduced as the selective regions of balanced policy from national hi-tech zones, at last, some suggestions are put forward accordingly.
Key words
national hi-tech zone /
spatial polarization /
balanced policy
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