U-Statistics and Their Asymptotic Results for Some Inequality and Poverty Measures

Kuan Xu

Econometric Reviews, 2007, vol. 26, issue 5, 567-577

Abstract: U-statistics form a general class of statistics that have certain important features in common. This class arises as a generalization of the sample mean and the sample variance, and typically members of the class are asymptotically normal with good consistency properties. The class encompasses some widely used income inequality and poverty measures, in particular the variance, the Gini index, the poverty rate, the average poverty gap ratios, the Foster-Greer-Thorbecke index, and the Sen index and its modified form. This paper illustrates how these measures come together within the class of U-statistics, and thereby why U-statistics are useful in econometrics.

Keywords: Asymptotic theory; Inequality; Measures; Poverty; U-statistics (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1080/07474930701512170

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