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math.ST2025
Unsupervised optimal deep transfer learning for classification under general conditional shift
Junjun Lang, Yukun Liu
Classifiers trained solely on labeled source data may yield misleading results when applied to unlabeled target data drawn from a different distribution. Transfer learning can rect…
math.ST2024
Efficient estimation of partially linear additive Cox models and variance estimation under shape restrictions
Junjun Lang, Yukun Liu, Jing Qin
Shape-restricted inferences have exhibited empirical success in various applications with survival data. However, certain works fall short in providing a rigorous theoretical justi…
math.ST2022
Tuning-parameter-free optimal propensity score matching approach for causal inference
Yukun Liu, Jing Qin
Propensity score matching (PSM) is a pseudo-experimental method that uses statistical techniques to construct an artificial control group by matching each treated unit with one or…