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Edgeworth expansions and normalizing transforms for inequality measures

[Zeitschriftenartikel]

Garderen, Kees Jan van; Schluter, Christian

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Abstract Finite sample distributions of studentized inequality measures differ substantially from their asymptotic normal distribution in terms of location and skewness. We study these aspects formally by deriving the second order expansion of the first and third cumulant of the studentized inequality measure. We state distribution-free expressions for the bias and skewness coefficients. In the second part we improve over first-order theory by deriving Edgeworth expansions and normalizing transforms. These normalizing transforms are designed to eliminate the second order term in the distributional expansion of the studentized transform and converge to the Gaussian limit at rate O(n−1). This leads to improved confidence intervals and applying a subsequent bootstrap leads to a further improvement to order O(n−3/2). We illustrate our procedure with an application to regional inequality measurement in Côte d'Ivoire.
Klassifikation Wirtschaftsstatistik, Ökonometrie, Wirtschaftsinformatik
Freie Schlagwörter C10; C14; D31; D63; I32; Generalized Entropy inequality measures; Higher order expansions; Normalizing transformations
Sprache Dokument Englisch
Publikationsjahr 2009
Seitenangabe S. 16-29
Zeitschriftentitel Journal of Econometrics, 150 (2009) 1
DOI http://dx.doi.org/10.1016/j.jeconom.2008.12.022
Status Postprint; begutachtet (peer reviewed)
Lizenz PEER Licence Agreement (applicable only to documents from PEER project)
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