Papers

Preprints

1. Causal Effects of Modified Treatment Policies under Positivity Violations: A Partial Identification Approach
   Koo, T., Stuart, E. A., Rudolph, K. E., & Miles, C. H. (2026)

2. Synthetic Control with Weight Uncertainty: Robust Identification and Statistical Inference
   Koo, T., & Guo, Z. (2026)

Publications

1. Design-based Causal Inference for Incomplete Block Designs
   Koo, T., & Pashley, N.E. (2026)
   Biometrika 113 (2), asag013.

2. RobustIV and controlfunctionIV: Causal Inference for Linear and Nonlinear Models with Invalid Instrumental Variables
   Koo, T., Lee, Y., Small, D.S., & Guo, Z. (2023)
   Observational Studies 9(4), 97-120.