Detecting Multiple Structural Breaks in Systems of Linear Regression Equations with Integrated and Stationary Regressors
含单整与平稳解释变量的线性回归方程系统多重结构突变检测AI 解读 ↓
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含单整与平稳解释变量的线性回归方程系统多重结构突变检测AI 解读 ↓
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In this paper, we propose a two-step procedure based on the group LASSO estimator in combination with a backward elimination algorithm to detect multiple structural breaks in linear regressions with multivariate responses. Applying the two-step estimator, we jointly detect the number and location of structural breaks, and provide consistent estimates of the coefficients. Our framework is flexible enough to allow for a mix of integrated and stationary regressors, as well as deterministic terms. Using simulation experiments, we show that the proposed two-step estimator performs competitively against the likelihood-based approach (Qu and Perron, 2007; Li and Perron, 2017; Oka and Perron, 2018) in finite samples. However, the two-step estimator is computationally much more efficient. An economic application to the identification of structural breaks in the term structure of interest rates illustrates this methodology.
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高维向量自回归模型中的序贯变点检测
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有效连接网络断点的快速检测方法
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多元时间序列中多个结构断点的检测
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多维速度变化检测中惩罚最大似然估计的一致性
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拟最大似然断点估计的锐信噪比阈值
We establish a sharp pathwise signal-to-noise criterion for quasi-maximum-likelihood (QML) estimation of a dominant breakpoint in the second-moment structure of a multivariate time series: the QML estimator is consistent whenever the between-regime contrast exceeds the within-regime fluctuation by an explicit factor, and below this threshold global recovery can fail. Two innovations drive the result. First, the framework is pathwise: no stochastic model is imposed on the…