arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.08623stat.ME
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稀疏GLARMA模型中的变量选择

Variable selection in sparse GLARMA models

M. Gomtsyan, C. Lévy-Leduc, S. Ouadah, L. Sansonnet

摘要:

针对离散值时间序列建模中普遍存在的稀疏GLARMA模型,提出了一种新的两阶段变量选择方法。我们的方法包括迭代结合自回归滑动平均(ARMA)系数的GLARMA模型的正则化方法设计用于执行变量选择的回归系数的广义线性模型(GLM)的估计。我们首先建立了ARMA部分系数估计在一种特殊情况下的相合性。然后,我们解释如何有效地实施我们的方法。最后,我们使用合成数据评估我们的方法的性能,并将其与其他方法进行比较。我们的方法是非常有吸引力的,因为它受益于一个低的计算负荷,并能够优于其他方法的系数估计方面,特别是在恢复非空回归系数。

英文摘要:

In this paper, we propose a novel and efficient two-stage variable selection approach for sparse GLARMA models, which are pervasive for modeling discrete-valued time series. Our approach consists in iteratively combining the estimation of the autoregressive moving average (ARMA) coefficients of GLARMA models with regularized methods designed for performing variable selection in regression coefficients of Generalized Linear Models (GLM). We first establish the consistency of the ARMA part coefficient estimators in a specific case. Then, we explain how to efficiently implement our approach. Finally, we assess the performance of our methodology using synthetic data and compare it with alternative methods. Our approach is very attractive since it benefits from a low computational load and is able to outperform the other methods in terms of coefficient estimation, particularly in recovering the non null regression coefficients.

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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