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arXiv 2301.03085stat.MEmath.STstat.TH
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基于广义最小二乘的异方差和结构突变时间序列的Granger因果检验

Granger causality test for heteroskedastic and structural-break time series using generalized least squares

Hugo J. Bello

摘要:

提出了一种基于自协方差矩阵估计和广义最小二乘的时间序列因果关系判定方法-GLS Granger检验。我们展示了所提出的自协方差矩阵估计器(滑动自协方差矩阵)的有效性,并通过合成数据集和由加密货币组成的真实数据集将所提出的方法与经典的Granger F检验进行了比较。模拟结果表明,建议的GLS格兰杰检验捕获的因果关系更准确地比格兰杰F-检验的情况下,异方差或结构断裂残差。最后,我们使用所提出的方法来解开加密货币之间未知的因果关系。

英文摘要:

This paper proposes a novel method (GLS Granger test) to determine causal relationships between time series based on the estimation of the autocovariance matrix and generalized least squares. We show the effectiveness of proposed autocovariance matrix estimator (the sliding autocovariance matrix) and we compare the proposed method with the classical Granger F-test with via a synthetic dataset and a real dataset composed by cryptocurrencies. The simulations show that the proposed GLS Granger test captures causality more accurately than Granger F-tests in the cases of heteroskedastic or structural-break residuals. Finally, we use the proposed method to unravel unknown causal relationships between cryptocurrencies.

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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