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arXiv 1610.01889stat.MEstat.AP
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矩阵值高维时间序列的因子模型

Factor Models for Matrix-Valued High-Dimensional Time Series

Dong Wang, Xialu Liu, Rong Chen

摘要:

在金融、经济和许多其他领域,矩阵形式的观测经常随着时间的推移而被观察到。例如,许多经济指标是在不同的国家随着时间的推移而获得的。随着时间的推移,许多公司的各种财务特征都会被报告。虽然很自然地将矩阵观测值转换为长向量,然后使用标准向量时间序列模型或因子分析,但通常情况下,矩阵的列和行表示以非常结构化的方式密切相关的不同信息集。我们提出了一种新的因素模型,保持和利用矩阵结构,以实现更大的降维,以及找到更清晰,更可解释的因素结构。估计过程和它的理论性质进行了研究,并与模拟和真实的例子证明。

英文摘要:

In finance, economics and many other fields, observations in a matrix form are often observed over time. For example, many economic indicators are obtained in different countries over time. Various financial characteristics of many companies are reported over time. Although it is natural to turn a matrix observation into a long vector then use standard vector time series models or factor analysis, it is often the case that the columns and rows of a matrix represent different sets of information that are closely interrelated in a very structural way. We propose a novel factor model that maintains and utilizes the matrix structure to achieve greater dimensional reduction as well as finding clearer and more interpretable factor structures. Estimation procedure and its theoretical properties are investigated and demonstrated with simulated and real examples.

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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