FANG, Xiao 方笑

Position Associate Professor
Email xfang [at]
ORCiD 0000-0002-4853-7419
Phone Number 3943 5254
Fax Number 2603 5188
Address LSB 108

Academic Background

BSc (Peking University)

PhD (National University of Singapore)

Research Interest


Selected Publications

(See the full list of publications in my homepage)

  • Normal approximation for exponential random graphs. (with Song-Hao Liu and Qi-Man Shao) Preprint (2024).
  • High-dimensional central limit theorems by Stein’s method in the degenerate case. (with Yuta Koike, Song-Hao Liu and Yi-Kun Zhao) Preprint (2023).
  • From p-Wasserstein bounds to moderate deviations. (with Yuta Koike) Electronic Journal of Probability 28 (2023), 1-52.
  • High order steady-state diffusion approximations. (with Anton Braverman and J. G. Dai) To appear in Operations Research.
  • Cramér-type moderate deviation for quadratic forms with a fast rate. (with Song-Hao Liu and Qi-Man Shao) Bernoulli 29 (2023), 2466-2491.
  • Large-dimensional central limit theorem with fourth-moment error bounds on convex sets and balls. (with Yuta Koike) To appear in Annals of Applied Probability.
  • Normal approximation and fourth moment theorems for monochromatic triangles. (with Bhaswar B. Bhattacharya and Han Yan) Random Structures & Algorithms 60 (2022), 25-53.
  • High-dimensional central limit theorems by Stein’s method. (with Yuta Koike) Annals of Applied Probability 31 (2021), 1660-1686.
  • Segmentation and estimation of change-point models: false positive control and confidence regions. (with Jian Li and David Siegmund) Annals of Statistics 48 (2020), 1615-1647.
  • Multivariate normal approximation by Stein’s method: the concentration inequality approach. (with Louis H. Y. Chen) Preprint (2015).


Research Grants

  • 2024.1-2026.12, Hong Kong RGC GRF 14303423: Stein’s method, information functionals, and the central limit theorem
  • 2023.1-2025.12, Hong Kong RGC GRF 14304822: High-dimensional central limit theorems by Stein’s Method
  • 2021.9-2024.8, Hong Kong RGC GRF 14305821: Asymptotic Expansions of Expectations by Stein’s Method
  • 2019.1-2021.12, Hong Kong RGC GRF 14302418: Cramér-Type Moderate Deviations by Stein’s Method
  • 2018.1-2020.12, Hong Kong RGC ECS 24301617: Kolmogorov Bounds for Normal and Non-normal Approximations


Professional Services

  • Invited reviewer for Mathematical Reviews
  • Referee for Ann. Appl. Probab., Ann. Probab., Ann. Statist., Bernoulli, J. R. Stat. Soc. Ser. B, etc.


Honours and Awards

  • 2010, LAHA Travel Award from the Institute of Mathematical Statistics
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