Jiahui Xin

Ph.D. Candidate in Statistics Institute of Statistics and Big Data, Renmin University of China Currently visiting MRC Biostatistics Unit, University of Cambridge Email: jiahui.xin AT mrc-bsu DOT cam DOT ac DOT uk [Curriculum Vitae]      LinkedIn      GitHub

I am a Ph.D. candidate in Statistics at the Institute of Statistics and Big Data, Renmin University of China, supervised by Prof. Wei Ma. I am currently visiting the MRC Biostatistics Unit, University of Cambridge, hosted by Dr. David Robertson, and collaborating with Dr. Stef Baas on exact inference for covariate-adjusted response-adaptive designs. I am fortunate to collaborate with Prof. Hanzhong Liu (Tsinghua University) and Prof. Feifang Hu (George Washington University).

Prior to this, I received my Bachelor's degree in Statistics from the School of the Gifted Young, University of Science and Technology of China in 2021.

Research Interests

My research focuses on precision medicine and optimization of clinical trials. Specifically, I am interested in:

• Adaptive Design

• Robust Inference

• Treatment Heterogeneity

Research Papers

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

• Cross-Validation Model Averaging under Covariate-Adaptive Randomization.
  Fuyi Tu, Jiahui Xin and Wei Ma.
  Under Review at Statistica Sinica.
  

• Covariate-Adaptive Randomization with Many Strata: Asymptotic Theory and Statistical Inference.
  Jiahui Xin, Hanzhong Liu, Feifang Hu and Wei Ma.
  Manuscript in preparation for submission to Biometrika.
  [arXiv (previous 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 inference for covariate-adjusted response-adaptive designs.
  MRC Biostatistics Unit, University of Cambridge.

Industry Experience

• Astellas Pharma, Clinical Biostatistics Intern, June 2025 – Aug. 2025
  Developed adaptive enrollment strategies for single-arm survival trials under practical covariate shift.

Recent Presentations

• Isaac Newton Institute for Mathematical Sciences, Causal Inference in the Real-World Workshop, Cambridge, UK, 2026 — Upcoming Poster Presentation
  Title: Covariate-adaptive enrollment for single-arm trials using external controls

• Isaac Newton Institute for Mathematical Sciences, Causal Inference in Biomedicine Workshop, Bristol, UK, 2026 — Upcoming Poster Presentation
  Title: Covariate-adaptive enrollment for single-arm trials using external controls

• MRC Biostatistics Unit, University of Cambridge, Efficient Study Design Discussion Group, 2026, Cambridge, UK — Invited Talk
  Title: Covariate-adaptive randomization with many strata: Asymptotic theory and statistical inference

• Drug Information Association, Quantitative Science Forum, 2025, Nanjing, China - Invited Speaker
  Title: Covariate-adaptive enrollment for single-arm survival trials using external controls

• Chinese Statistical Association of Young Statisticians, Ph.D. Student Forum, 2025, Jinan, China - Travel Award & Oral Presentation
  Title: Inference under covariate-adaptive randomization with many strata

• National Graduate Student Statistics Forum, Biostatistics and Epidemiology Section, 2024, Beijing, China - Selected Paper & Oral Presentation
  Title: Inference under covariate-adaptive randomization with many strata

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Contact

If you are interested in discussing with me, feel free to drop me an email!

Email: jiahui.xin@mrc-bsu.cam.ac.uk; xinjh@ruc.edu.cn