Ruoqi Yu

About

Ruoqi Yu is an Assistant Professor in the Department of Statistics at the University of Illinois. Her research primarily focuses on causal inference, particularly in observational studies and factorial experiments. She has contributed significantly to the development of methods for covariate balancing, matching techniques, and treatment effect estimation. Her work includes advancing balancing weights for causal inference in observational factorial studies and exploring the effectiveness of fine balance for covariate balancing. Yu has also investigated near-far matching methods for instrumental variables study designs with large observational datasets, addressing important applications such as maternal complications after cesarean delivery. Her research outputs demonstrate a strong emphasis on methodological innovations in statistics to improve the accuracy and reliability of causal conclusions drawn from complex observational data.

Research topics

• Chemistry
• Physics
• Nanotechnology
• Materials science
• Atomic physics
• Chemical physics
• Geometry
• Metallurgy
• Astrobiology
• Optoelectronics

Selected publications

• The Honest Truth About Causal Trees: Accuracy Limits for Heterogeneous Treatment Effect Estimation

  ArXiv.org · 2025-09-14

  preprintOpen accessSenior author

  Recursive decision trees are widely used to estimate heterogeneous causal treatment effects in experimental and observational studies. These methods are typically implemented using CART-type recursive partitioning and are often viewed as adaptive procedures capable of discovering treatment effect heterogeneity in high-dimensional settings. We study causal tree estimators based on adaptive recursive partitioning and establish lower bounds on their estimation accuracy. Under basic conditions, we s…

  PublisherOA PDFDOI

• Boundary Discontinuity Designs: Theory and Practice

  arXiv (Cornell University) · 2025-11-09

  preprintOpen accessSenior author

  The boundary discontinuity (BD) design is a non-experimental method for identifying causal effects that exploits a thresholding rule based on a bivariate score and a boundary curve. This widely used method generalizes the univariate regression discontinuity design but introduces unique challenges arising from its multidimensional nature. We synthesize over 80 empirical papers that use the BD design, tracing the method's application from its formative stages to its implementation in modern resear…

  PublisherOA PDFDOI

• Distributed Coherent Beamforming at 60 GHz Enabled by Optically-Established Coherence

  ArXiv.org · 2025-09-17

  preprintOpen access

  We implement and experimentally demonstrate a 60 GHz distributed system leveraging an optical time synchronization system that provides precise time and frequency alignment between independent elements of the distributed mesh. Utilizing such accurate coherence, we perform receive beamforming with interference rejection and transmit nulling. In these configurations, the system achieves a coherent gain over an incoherent network of N nodes, significantly improving the relevant signal power ratios.…

  PublisherOA PDFDOI

• Correction: ZC3H11A mutations cause high myopia by triggering PI3K-AKT and NF-κB-mediated signaling pathway in humans and mice

  eLife · 2025-12-01

  articleOpen access
  PublisherDOI

Frequent coauthors

• Jing Zhu

  159 shared

• Wandong Xing

  Fuzhou University

  98 shared

• Zhiying Cheng

  State Key Laboratory of New Ceramics and Fine Processing

  56 shared

• Haozhi Sha

  University of California, Los Angeles

  41 shared

• Yadong Li

  Anhui Normal University

  34 shared

• Yang Zhang

  33 shared

• Shuai Dong

  32 shared

• Fanyan Meng

  32 shared

Education

• Ph.D., Shenyang National Laboratory for Materials Science

  Institute of Metal Research Chinese Academy of Sciences

  2002

• Master, Laboratory of Atomic Imaging of Solids

  Institute of Metal Research Chinese Academy of Sciences

  1999

• Bachelor, Department of Materials Science and Engineering

  Zhejiang University

  1996

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