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Presented By: Department of Statistics

Statistics Department Seminar Series: Zijun Gao, PhD Candidate, Department of Statistics, Stanford University

"Estimating Heterogeneous Treatment Effects for General Response Distributions"

Zijun Gao Zijun Gao
Zijun Gao
Abstract: "Heterogeneous treatment effect models allow us to compare treatments at subgroup and individual levels, and are of increasing popularity in applications like personalized medicine, advertising, and education. In this talk, we first survey different causal estimands used in practice, which focus on estimating the difference in conditional means. We then propose DINA — the difference in natural parameters — to quantify heterogeneous treatment effect in exponential families and the Cox model. For binary outcomes and survival times, DINA is both convenient and more practical for modeling the influence of covariates on the treatment effect. Second, we introduce a meta-algorithm for DINA, which allows practitioners to use powerful off-the-shelf machine learning tools for the estimation of nuisance functions, and which is also statistically robust to errors in inaccurate nuisance function estimation. We demonstrate the efficacy of our method combined with various machine learning base-learners on simulated and real datasets."

https://zijungao.github.io/
Zijun Gao Zijun Gao
Zijun Gao

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