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arXiv 1005.2137stat.MEmath.STstat.TH
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构造时间序列置信区间的自规范化方法

A self-normalized approach to confidence interval construction in time series

Xiaofeng Shao

摘要:

我们提出了一种新的方法来构造与平稳时间序列相关的量的置信区间,该方法避免了直接估计渐近方差。不同于现有的调谐参数依赖的方法,我们的方法具有吸引人的方便,是免费的选择任何用户选择的数量或平滑参数。该区间是建立在一个渐近分布自由的自归一化统计量的基础上的,其中归一化矩阵是使用递归估计计算的。在温和的条件下,我们建立了我们的方法的理论有效性的一个广泛的一类统计,是固定或增长的维度的经验分布的泛函。从实用的角度来看,我们的方法是概念简单,易于实现,可以很容易地使用的从业者。通过蒙特卡罗模拟比较了新方法与正态近似法和块自举法的有限样本性能。

英文摘要:

We propose a new method to construct confidence intervals for quantities that are associated with a stationary time series, which avoids direct estimation of the asymptotic variances. Unlike the existing tuning-parameter-dependent approaches, our method has the attractive convenience of being free of choosing any user-chosen number or smoothing parameter. The interval is constructed on the basis of an asymptotically distribution-free self-normalized statistic, in which the normalizing matrix is computed using recursive estimates. Under mild conditions, we establish the theoretical validity of our method for a broad class of statistics that are functionals of the empirical distribution of fixed or growing dimension. From a practical point of view, our method is conceptually simple, easy to implement and can be readily used by the practitioner. Monte-Carlo simulations are conducted to compare the finite sample performance of the new method with those delivered by the normal approximation and the block bootstrap approach.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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