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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

摘要

This paper introduces a method for simulating univariate and multivariate Dagum distributions through the method of L-moments and L-correlation. 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 -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L矩和L相关的方法来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具有可控制的L斜度,L峰度和L相关度的非正态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。对拟议方法的评估还表明,在相对偏差和相对效率方面,L偏度,L峰度和L相关性的估计值明显优于基于传统产品矩的偏度,峰度和Pearson相关性的对应方法。 –最明显的是在重尾分布的情况下。

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