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- [1] Measurement of Tax Progressivity:An International Comparison. Nanak C Kakwani. The Economic Journal . 1977
- [2] Efficient Estimation of the Lorenz Curve and Associated Inequality Measures from Grouped Observations. Kakwani,Podder N. Econometrica . 1976
- [3] 2007中国城市[镇]生活与价格年鉴. 国家统计局城市社会经济调查司. 中国统计出版社 . 2007