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stat.ME2025
Scale-Invariant Robust Estimation of High-Dimensional Kronecker-Structured Matrices
Xiaoyu Zhang, Zhiyun Fan, Wenyang Zhang +1
High-dimensional Kronecker-structured estimation faces a conflict between non-convex scaling ambiguities and statistical robustness. The arbitrary factor scaling distorts gradient…
stat.ME2025
High-dimensional low-rank matrix regression with unknown latent structures
Di Wang, Xiaoyu Zhang, Guodong Li +1
We study low-rank matrix regression in settings where matrix-valued predictors and scalar responses are observed across multiple individuals. Rather than assuming a fully homogeneo…
stat.ME2025
A Hybrid Framework Combining Autoregression and Common Factors for Matrix Time Series
Zhiyun Fan, Xiaoyu Zhang, Di Wang
Matrix-valued time series are ubiquitous in modern economics and finance, yet modeling them requires navigating a trade-off between flexibility and parsimony. We propose the Matrix…