Author

Xiaojie Mao

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Preprint Aug 2026

A Forecast Combination Framework for Hierarchical and Grouped Time Series Reconciliation

Forecast combining and forecast reconciliation for hierarchical and grouped time series have largely developed as separate research areas. This paper connects the two by developing a forecast combination framework for forecast reconciliation. For each bottom-level series, we construct a maximal linearly independent set...

Xixi Li, Zi Chen, James W. Taylor et al. · 0 citations

Preprint Aug 2026

Statistical Properties of Robust Learning under Distributional Shifts

Finite-sample generalization error bounds in the shifted target environment for both DRO and RS are derived, which fill a gap in understanding the statistical properties of robust learning methods under distributional shifts and provide a principled basis for comparing DRO and RS.

Zhiyi Li, Xiaojie Mao, Yun-Bei Xu et al. · 0 citations