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Tatsushi Oka

6 accepted papers

2026

Modeling Covariate Transition for Efficient Estimation of Longitudinal Treatment Effects in Randomized Experiments

ICML 2026poster

We present a regression-adjustment framework designed to estimate longitudinal treatment effects in randomized experiments under static regimes. Although regression-adjustment methods are useful for variance reduction in randomized experiments through the use of pre-treatment covariates, they usuall…

Cited by 0SourceScholar
2025

Beyond the Average: Distributional Causal Inference under Imperfect Compliance

NeurIPS 2025poster

We study the estimation of distributional treatment effects in randomized experiments with imperfect compliance. When participants do not adhere to their assigned treatments, we leverage treatment assignment as an instrumental variable to identify the local distributional treatment effect—the differ…

Cited by 0SourcecodeScholar
2025

On Efficient Estimation of Distributional Treatment Effects under Covariate-Adaptive Randomization

ICML 2025poster

This paper focuses on the estimation of distributional treatment effects in randomized experiments that use covariate-adaptive randomization (CAR). These include designs such as Efron's biased-coin design and stratified block randomization, where participants are first grouped into strata based on b…

2024

Estimating Distributional Treatment Effects in Randomized Experiments: Machine Learning for Variance Reduction

ICML 2024poster

We propose a novel regression adjustment method designed for estimating distributional treatment effect parameters in randomized experiments. Randomized experiments have been extensively used to estimate treatment effects in various scientific fields. However, to gain deeper insights, it is essentia…