Mixture matrix-valued autoregressive model
混合矩阵值自回归模型AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确研究矩阵值时间序列及衰退、扩张等情境下的动态状态变化,支持时间序列和结构变化方向。
混合矩阵值自回归模型AI 解读 ↓
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Time series of matrix-valued data are increasingly available in various areas including economics, finance, social science, among others. These data may shed light on the inter-dynamical relationships between two sets of attributes, for instance, countries and economic indices. The matrix autoregressive (MAR) model provides a parsimonious approach for analyzing such data. However, the MAR model, being a linear model with parametric constraints, cannot capture the nonlinear patterns in the data, such as regime shifts in the dynamics. We propose a mixture matrix autoregressive (MMAR) model for analyzing potential regime shifts in the dynamics between two attributes, for instance, due to recession versus expansion, or stable period versus pandemic. We propose an EM algorithm for maximum likelihood estimation. We derive some theoretical properties of the proposed method including consistency and asymptotic distribution, and illustrate its performance via simulations and real applications.