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An L-Moment Based Characterization of the Family of Dagum Distributions

机译:基于L矩的Dagum分布族的刻画

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This paper introduces a method for simulating univariate and multivariate Dagum distributions through the method of 𝐿-moments and 𝐿-correlations. A method is developed for characterizing non-normal Dagum distributions with controlled degrees of 𝐿-skew, 𝐿-kurtosis, and 𝐿-correlations. The procedure can be applied in a variety of contexts such as statistical modeling (e.g., income distribution, personal wealth distributions, etc.) and Monte Carlo or simulation studies. Numerical examples are provided to demonstrate that 𝐿-moment-based Dagum distributions are superior to their conventional moment-based analogs in terms of estimation and distribution fitting. Evaluation of the proposed method also demonstrates that the estimates of 𝐿-skew, 𝐿-kurtosis, and 𝐿-correlation are substantially superior to their conventional product-moment based counterparts of skew, kurtosis, and Pearson correlation in terms of relative bias and relative efficiency–most notably in the context of heavy-tailed distributions.
机译:本文介绍了一种通过&#119871-矩和&#119871-相关法模拟单变量和多变量Dagum分布的方法。开发了一种方法来表征控制度为-偏度,-峰度和-关联度的非正态Dagum分布。该程序可以在各种情况下应用,例如统计模型(例如,收入分配,个人财富分配等)和蒙特卡洛或模拟研究。提供了数值示例,以证明基于矩的Dagum分布在估计和分布拟合方面优于其常规的基于矩的类似物。对提出的方法的评估还表明,“-偏斜”,“#119871--峰度”和“#119871--相关性”的估计值明显优于其基于传统产品矩的偏斜,峰度和Pearson对应项。相对偏差和相对效率之间的相关性-特别是在重尾分布的情况下。

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