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stat.ME2024
Decomposition with Monotone B-splines: Fitting and Testing
Lijun Wang, Xiaodan Fan, Hongyu Zhao +1
A univariate continuous function can always be decomposed as the sum of a non-increasing function and a non-decreasing one. Based on this property, we propose a non-parametric regr…
stat.ME2023
Degrees of Freedom: Search Cost and Self-consistency
Lijun Wang, Hongyu Zhao, Xiaodan Fan
Model degrees of freedom ($\df$) is a fundamental concept in statistics because it quantifies the flexibility of a fitting procedure and is indispensable in model selection. To inv…