4 papers
Dimension-reduced outcome-weighted learning for estimating individualized treatment regimes in observational studies
Sungtaek Son, Eardi Lila, Kwun Chuen Gary Chan
Individualized treatment regimes (ITRs) aim to improve clinical outcomes by assigning treatment based on patient-specific characteristics. However, existing methods often struggle…
GMM with Many Weak Moment Conditions and Nuisance Parameters: General Theory and Applications to Causal Inference
Rui Wang, Kwun Chuen Gary Chan, Ting Ye
Weak identification arises in many statistical problems when key variables exhibit weak correlations-for example, when instrumental variables correlate weakly with treatment, or wh…
Cost-Effectiveness Analysis for Disease Prevention -- A Case Study on Colorectal Cancer Screening
Yi Xiong, Kwun C G Chan, Malka Gorfine +1
Cancer Screening has been widely recognized as an effective strategy for preventing the disease. Despite its effectiveness, determining when to start screening is complicated, beca…
The Categorical Instrumental Variable Model: Characterization, Partial Identification, and Statistical Inference
Yilin Song, F. Richard Guo, K. C. Gary Chan +1
We study categorical instrumental variable (IV) models with instrument, treatment and outcome taking finitely many values. We derive a simple closed-form characterization of the se…