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关注这篇论文的作者
Ron Mittelhammer
George Judge
Miguel Henry

基于熵的简单概率分布假设非参数检验

研究问题
如何构造统一且易计算的非参数检验,评估总体是否服从某个完全指定的参数分布,并减少人为调参需求?
方法与思路
作者依据待检验总体分布的特征函数构造熵检验,并通过模拟考察表现,以回归数据变换示例讨论复合假设应用。
材料陈述的贡献
摘要称检验无需用户指定核函数、带宽或评价网格;对若干备择分布,模拟检验功效随样本量增加而提高。
阅读关注点
应核对熵统计量的定义、临界值获取和显著性水平控制,以及数据变换处理复合假设时是否引入额外估计误差。
阅读边界
这是 arXiv 预印本,同行评审及期刊接收未核实;摘要未列出有效性条件及数值,一般复合假设扩展仍属讨论内容。

原文摘要

In this paper, we introduce a flexible and widely applicable nonparametric entropy-based testing procedure that can be used to assess the validity of simple hypotheses about a specific parametric population distribution. The testing methodology relies on the characteristic function of the population probability distribution being tested and is attractive in that, regardless of the null hypothesis being tested, it provides a unified framework for conducting such tests. The testing procedure is also computationally tractable and relatively straightforward to implement. In contrast to some alternative test statistics, the proposed entropy test is free from user-specified kernel and bandwidth choices, idiosyncratic and complex regularity conditions, and/or choices of evaluation grids. Several simulation exercises were performed to document the empirical performance of our proposed test, including a regression example that is illustrative of how, in some contexts, the approach can be applied to composite hypothesis-testing situations via data transformations. Overall, the testing procedure exhibits notable promise, exhibiting appreciable increasing power as sample size increases for a number of alternative distributions when contrasted with hypothesized null distributions. Possible general extensions of the approach to composite hypothesis-testing contexts, and directions for future work are also discussed.

笔记与分组
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