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分类依据与纠错

AI 根据所提供的论文材料归类:摘要直接讨论短记忆、长记忆及样本自协方差构造的检验,属于时间序列方法。

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代码、数据与补充材料

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关注这篇论文的作者
David Harris
Brendan McCabe
Stephen Leybourne

长记忆检验

研究问题
如何检验短记忆原假设对长记忆备择,并降低短期自相关引入的干扰参数对检验分布及有限样本表现的影响?
方法与思路
作者仅使用高阶样本自协方差构造统计量,并针对确定性线性回归中的不可观测扰动提出残差形式的检验。
材料陈述的贡献
摘要称残差统计量在原假设下渐近标准正态,且对长记忆备择一致;模拟显示其尺寸较稳健、功效具有竞争力。
阅读关注点
应核对自协方差阶数的选择、回归残差替代的影响、渐近条件,以及模拟中比较检验的设定与尺寸和功效。
阅读边界
仅依据所给出版社摘要;稳健性与功效比较属于作者报告,具体模拟设计和数值未说明,不能推断其普遍优于其他检验。

原文摘要

This paper introduces a new test statistic for the null hypothesis of short memory against long memory alternatives. The novelty of our statistic is that it is based on only high-order sample autocovariances and by construction eliminates the effects of nuisance parameters typically induced by short memory autocorrelation. For practically relevant situations where the short memory process is not directly observed, but instead appears as the disturbance term in a deterministic linear regression model, we are able to demonstrate that our residual-based statistic has an asymptotic standard normal distribution under the null hypothesis. We also establish consistency of the statistic under long memory alternatives. The finite-sample properties of our procedure are compared to other well-known tests in the literature via Monte Carlo simulations. These show that the empirical size properties of the new statistic can be very robust compared to existing tests and also that it competes well in terms of power.We thank the associate editor and two anonymous referees for their valuable comments on an earlier draft of this paper.

笔记与分组