With KZ polarization index, it is found that there is polarization orientation in coast-inland, low and high development areas, the polarization in low and high decentralization is not serious.

• 利用KZ极化指数发现，农村居民收入在极化方向上主要体现在沿海和内陆之间以及高经济发展水平地区和低经济发展水平地区之间，而高财政分权和低财政分权在区域之间的极化程度并不明显。