Welcome

I am an Assistant Professor in the Department of Public Health and Health Sciences at Northeastern University and an Affiliate Investigator in the Vaccine and Infectious Disease Division at the Fred Hutch Cancer Center.

My research focuses on developing novel statistical and machine learning methods to leverage real-world data to improve decision-making in public health and clinical medicine. This involves designing robust, efficient, and targeted estimators for causal effects using large-scale data generated from electronic health records and clinical trial data. Active areas of research include causal inference, conformal inference, data integration, federated and transfer learning, and sensitivity analysis.

I obtained my PhD in Biostatistics at Harvard University, advised by Professor Tianxi Cai and Professor Lorenzo Trippa. I completed a postdoctoral fellowship in Health Care Policy at Harvard Medical School, advised by Professor Sharon-Lise Normand. I received an AM in Biostatistics from Harvard, an MPhil in Healthcare Operations from the University of Cambridge, an MA in Global Affairs from Tsinghua University, and a BS in Public Health and Biostatistics from UNC - Chapel Hill.

I enjoy playing golf, especially in my home state of North Carolina, reading history, especially biographies, and staying up-to-date with global affairs, especially US-China relations. Feel free to reach out via email: lar.han@northeastern.edu.

Recent News

Jan 16, 2025. [New preprint] COADVISE: Covariate Adjustment with Variable Selection and Missing Data Imputation in Randomized Controlled Trials is available on Arxiv.

Jan 8, 2025. [Teaching] Spring 2025, teaching a PhD-level first course in causal inference, PHTH 6800: Causal Inference in Public Health Research, Boston, MA.

Jan 6, 2025. [Publication] Robust Inference for Federated Meta-Learning has been published in Journal of the American Statistical Association.

Jan 5, 2025. [Acceptance] Federated Adaptive Causal Estimation (FACE) of Target Treatment Effects has been accepted at Journal of the American Statistical Association.

Dec 17, 2024. [New preprint] On the role of surrogates in conformal inference of individual causal effects is available on Arxiv.

Dec 17, 2024. [Invited talk at ICSDS] Nice, France.

Nov 27, 2024. [New preprint] Bounding causal effects with an unknown mixture of informative and non-informative censoring is available on Arxiv.

Nov 26, 2024. [Publication] Truncated, Not Forgotten — Handling Left Truncation in Time-to-Event Studies is published in NEJM Evidence.

Nov 21, 2024. [Talk at UPenn Center for Causal Inference] Virtual.

Nov 17, 2024. [Acceptance] Robust Inference for Federated Meta-Learning has been accepted at Journal of the American Statistical Association.

Nov 13, 2024. [Talk at Duan Lab, Harvard Biostatistics] Boston, MA.

Nov 7-8, 2024. [Invited talk at FIORD] Bethesda, MD.

Sep 10, 2024. [Invited talk at NYU Langone Biostatistics Seminar] NYC, NY.

Aug 5-8, 2024. [JSM 2024] Presenting in the session New methods for integrative and adaptive analysis in Portland, OR.

Jul 24-26, 2024. [ICML 2024] Presenting Multi-Source Conformal Inference Under Distribution Shift in Vienna, Austria.

Jul 23, 2024. [Publication] Detecting univariate, bivariate, and overall effects of drug mixtures using Bayesian kernel machine regression is published in The American Journal of Drug and Alcohol Abuse.

Jul 18, 2024. [WebENAR: Van Ryzin Award Highlights] Identifying Surrogate Markers in Real-world Comparative Effectiveness Research.

Jul 11, 2024. [New preprint] A Surrogate Endpoint Based Provisional Approval Causal Roadmap is available on Arxiv.

Jul 8-10, 2024. [Invited session organizer and speaker at the International Conference on Frontiers of Data Science] Hangzhou, China.

Jul 4-7, 2024. [Invited to attend NCUSCR-Schwarzman Scholars Global Health Seminar] Geneva, Switzerland.

Jun 24, 2024. [Invited talk at Harvard Medical School, Health Care Policy] Boston, MA.

May 16, 2024. [Invited talk at ACIC] Seattle, WA.

May 15, 2024. [Acceptance] Multi-Source Conformal Inference Under Distribution Shift has been accepted at ICML 2024! [Github]

Apr 6, 2024. [New paper] Privacy-Preserving, Communication-Efficient, and Target-Flexible Hospital Quality Measurement is published in the Annals of Applied Statistics!

Mar 21, 2024. [New preprint] A Transfer Learning Causal Approach to Evaluate Racial/Ethnic and Geographic Variation in Outcomes Following Congenital Heart Surgery is available on Arxiv.

Mar 20, 2024. [Invited talk at Northeastern University, Center for Signal Processing, Imaging, Reasoning, and Learning] Boston, MA.

Feb 12, 2024. [Invited talk at INRIA Causal Inference and Missing Data Group] Paris, France (Virtual).