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本页整理公开书目信息,不生成学术质量评分。AI 解读根据题名及所注明的摘要或原文片段生成,未完成全文核验,可能有误;具体假设、证明与结论请核对原文。摘要保留来源文本,未经模型改写。

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分类依据与纠错

AI 根据所提供的论文材料归类:摘要直接检验线性与非线性时间序列模型的条件均值设定,属于时间序列模型诊断方法。

反馈分类问题

正在核对关联版本…

代码、数据与补充材料

正在核对对应版本的资源…

关注这篇论文的作者
Yuxin Tao
Feiyu Jiang
Xiaofeng Shao

采用样本分割的广义谱检验

研究问题
时间序列条件均值设定检验中,如何降低参数估计对残差统计量极限分布的影响,同时避免反复估计带来的计算成本?
方法与思路
作者用一部分样本估计参数,在另一部分构造跨所有滞后的广义谱统计量,并采用无需生成时间序列的乘子自助法。
材料陈述的贡献
摘要称,在正则条件和得分对齐条件下,残差过程与真实误差过程具有相同零假设极限分布,并具一致性和局部功效。
阅读关注点
全文应核对得分对齐条件的具体含义、分割样本间时间依赖如何处理,以及乘子自助法和局部功效结论的条件。
阅读边界
这是 arXiv 预印本,同行评审及期刊接收未核实;摘要指出极限分布仍非枢轴,且未提供理论条件及计算节省的具体数值。

原文摘要

Residual-based goodness-of-fit tests for parametric time-series models are often complicated by parameter-estimation effects, which can alter the limiting behavior of diagnostic statistics. We propose a sample-splitting generalized spectral test (in the spirit of Escanciano(2006)) for assessing conditional mean specification in linear and nonlinear time-series models. The procedure estimates the model parameter on a fitting subsample and constructs a generalized spectral Cramer-von Mises statistic from residuals computed on a checking/testing subsample. The statistic aggregates pairwise conditional mean restrictions over all lags and is therefore bandwidth-free and free of truncation-lag selection. Under mild regularity conditions and a score-alignment condition, the residual-based process has the same limiting null distribution as the infeasible oracle process based on the true errors. Although the resulting limiting law is still non-pivotal, it can be consistently approximated by a simple multiplier bootstrap that does not require generating bootstrap time series or re-estimating parameters. Such an oracle-equivalence property is in sharp contrast to the original full-sample test, for which parameter estimation contributes an additional first-order term to the limiting process, and requires re-estimating parameters in each bootstrapped sample. We further establish consistency of the proposed test against fixed alternatives and nontrivial power against local alternatives. Extensive simulations and real data analyses show that the proposed test controls size well, has comparable power, and delivers substantial computational savings in models where repeated estimation is costly.

笔记与分组
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