I am an Assistant Professor in the Department of Economics at Columbia University.
Email: hc3516@columbia.edu
Publications
Completion of TP and TN border patterns. (2020) Linear and Multilinear Algebra, Volume 68, 1753-1766. (with Charles Johnson)
Exact Bias Correction for Linear Adjustment of Randomized Controlled Trials. (2024). Econometrica, Volume 92, 1503-1519. (with P.M. Aronow and Joel Middleton)
Design-Based Inference for Spatial Experiments under Unknown Interference (2025). The Annals of Applied Statistics, 19(1): 744-768. (with Ye Wang, Cyrus Samii, P.M. Aronow). [Link to arXiv]
Fast Permutation Inference for Randomized Experiments with Binary Outcomes (2025). Journal of Econometrics, Volume 251. (with P. M. Aronow and Patrick Lopatto).
A Meta-learner for Heterogeneous Effects in Difference-in-Differences (2025). ICML. (with Hui Lan, Eleanor Dillon, and Vasilis Syrgkanis). [Link to arXiv]
Working Paper
Design-based Estimation Theory for Complex Experiments. [Link to arXiv]
Approximating Choice Data by Discrete Choice Models (with Yusuke Narita and Kota Saito). [Link to arXiv] (R&R, Management Science)
Randomization-Based Confidence Intervals For the Local Average Treatment Effect (with P. M. Aronow and Patrick Lopatto). [Link to the paper] (R&R, Biometrika)