Yichi Zhang

Welcome!

I am an Assistant Professor in the Department of Statistics at Indiana University Bloomington. Before that, I was a Postdoctoral Scholar in the Fuqua School of Business and the Department of Biostatistics & Bioinformatics at Duke University. I received my Ph.D. in Statistics from North Carolina State University in 2023, and my B.S. in Mathematics and Applied Mathematics from Sichuan University in 2018.

Email   |   Google Scholar   |   Address Swain Hall East 235, 729 E. 3rd Street, Bloomington, IN 47405

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Research

Research Interests

  • Causal Learning and Mechanisms

  • Random Matrix Theory and Applications

  • Large-scale Computation and Randomized Algorithms

  • Uncertainty Quantification

    • Preprints

    Fisher Random Walk: Automatic Debiasing Contextual Preference Inference for Large Language Model Evaluation
    Yichi Zhang, Alexandre Belloni, Ethan X. Fang, Junwei Lu, Xiaoan Xu
    Preprint, 2026+
    Towards R-learner with Continuous Treatments GitHub
    Yichi Zhang, Dehan Kong, Shu Yang
    Preprint, 2026+

    Journal Papers

    Perturbation Analysis of Randomized SVD and its Applications to Statistics
    Yichi Zhang, Minh Tang
    Journal of the American Statistical Association, 2026+
    Semiparametric Localized Principal Stratification Analysis with Continuous Strata
    Yichi Zhang, Shu Yang
    Journal of the Royal Statistical Society Series B, 2025
    Higher-Order Entrywise Eigenvectors Analysis of Low-Rank Random Matrices: Bias Correction, Edgeworth Expansion, and Bootstrap
    Fangzheng Xie, Yichi Zhang
    Annals of Statistics, 2025
    A Theoretical Analysis of DeepWalk and Node2vec for Exact Recovery of Community Structures in Stochastic Blockmodels
    Yichi Zhang, Minh Tang
    IEEE Transactions on Pattern Analysis and Machine Intelligence, 2024
    Covariance Estimation for Matrix-valued Data
    Yichi Zhang, Weining Shen, Dehan Kong
    Journal of the American Statistical Association, 2023

    Refereed Conference Papers

    Meta-Router: Bridging Gold-standard and Preference-based Evaluations in Large Language Model Routing GitHub
    Yichi Zhang, Fangzheng Xie, Shu Yang, Chong Wu
    ICLR, 2026
    Multiobjective Distribution Matching
    Xiaoyuan Zhang, Peijie Li, Yingying Yu, Yichi Zhang, Han Zhao, Qingfu Zhang
    ICML, 2025
    Gliding over the Pareto Front with Uniform Designs
    Xiaoyuan Zhang, Genghui Li, Xi Lin, Yichi Zhang, Yifan Chen, Qingfu Zhang
    NeurIPS, 2024

    Teaching

  • STATX-490 Readings in Statistics, IUB, Spring 2026

  • STATS-352 Data Modeling and Inference, IUB, Spring 2026

  • STATS-520 Introduction to Statistics, IUB, Fall 2025

  • STATS-520 Introduction to Statistics, IUB, Spring 2025

  • ST-311 Introduction to Statistics, NCSU, Spring 2023

    • Awards and Honors

  • ASA Nonparametric Statistics Student Paper Award Finalist, 2023

  • IMS Hannan Graduate Student Travel Award, 2021

  • ENAR Distinguished Student Paper Award, 2021

  • Mu Sigma Rho, National Statistics Honor Society, 2018