Research

Research Roadmap

Published and Forthcoming Papers

• On the Achievability of Efficiency Bounds for Covariate-Adjusted Response-Adaptive Randomization.
  Jiahui Xin and Wei Ma.
  Statistical Methods in Medical Research, 2025.
  [DOI] [arXiv] [Code]
  

• Cross-Validation Model Averaging under Covariate-Adaptive Randomization.
  Fuyi Tu, Jiahui Xin, and Wei Ma.
  Statistica Sinica, forthcoming.
  [DOI] [Journal preprint]

Working Papers

• Covariate-Adaptive Randomization with Many Strata: Asymptotic Theory and Statistical Inference.
  Jiahui Xin, Hanzhong Liu, Feifang Hu, and Wei Ma.
  Working paper; an earlier version is available on arXiv.
  [arXiv (earlier version)]

• Covariate-Adaptive Enrollment for Single-Arm Trials Using External Controls.
  Jiahui Xin, Hengjia Fang, Zhiyue Huang, Satoshi Yoshida, and Wei Ma.
  Working paper.

Ongoing Projects

• Exact Tests for Covariate-Adjusted Response-Adaptive Designs (working title).
  Ongoing collaborative work with Stef Baas, David Robertson, and Sofia Villar; manuscript in preparation.