Outlier Detection in Cointegration Analysis
协整分析中的异常值检测AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确讨论单位根、协整以及结构突变对检验的影响,并定位异常事件,因此涉及时间序列与结构变化。
协整分析中的异常值检测AI 解读 ↓
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Standard unit-root and cointegration tests are sensitive to atypical events such as outliers and structural breaks. In this article, the authors use outlier-robust estimation techniques to examine the impact of these events on cointegration analysis. Their outlier-robust cointegration test provides a new diagnostic tool for signaling when standard cointegration results might be driven by a few aberrant observations. A main feature of the authors' approach is that the proposed robust estimator can be used to compute weights for all observations, which in turn can be used to identify the approximate dates of atypical events. The authors evaluate their method using simulated data and a Monte Carlo experiment. The authors also present an empirical example showing the usefulness of the proposed analysis.