Kolmogorov–Smirnov type testing for structural breaks: A new adjusted-range based self-normalization approach
结构突变的 KS 型检验:基于调整极差的自归一化方法AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接研究单变量和多变量时间序列的结构突变,以及时间序列回归参数稳定性,符合结构变化与时间序列方向。
结构突变的 KS 型检验:基于调整极差的自归一化方法AI 解读 ↓
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A popular self-normalization (SN) approach in time series analysis uses the variance of a partial sum as a self-normalizer. This is known to be sensitive to irregularities such as persistent autocorrelation, heteroskedasticity, unit roots and outliers. We propose a novel SN approach based on the adjusted-range of a partial sum, which is robust to these aforementioned irregularities. We develop an adjusted-range based Kolmogorov–Smirnov type test for structural breaks for both univariate and multivariate time series, and consider testing parameter constancy in a time series regression setting. Our approach can rectify the well-known power decrease issue associated with existing self-normalized KS tests without having to use backward and forward summations as in Shao and Zhang (2010), and can alleviate the “better size but less power” phenomenon when the existing SN approaches (Shao, 2010; Zhang et al., 2011; Wang and Shao, 2022) are used. Moreover, our proposed tests can cater for more general alternatives. Monte Carlo simulations and empirical studies demonstrate the merits of our approach.