Search Results for author: Alex Luedtke

Found 7 papers, 4 papers with code

Combining T-learning and DR-learning: a framework for oracle-efficient estimation of causal contrasts

no code implementations3 Feb 2024 Lars van der Laan, Marco Carone, Alex Luedtke

We introduce efficient plug-in (EP) learning, a novel framework for the estimation of heterogeneous causal contrasts, such as the conditional average treatment effect and conditional relative risk.

Adaptive debiased machine learning using data-driven model selection techniques

no code implementations24 Jul 2023 Lars van der Laan, Marco Carone, Alex Luedtke, Mark van der Laan

For this reason, practitioners may resort to simpler models based on parametric or semiparametric assumptions.

Model Selection valid

One-Step Estimation of Differentiable Hilbert-Valued Parameters

1 code implementation29 Mar 2023 Alex Luedtke, Incheoul Chung

When the parameter space is a reproducing kernel Hilbert space, we provide a means to obtain efficient, root-n rate estimators and corresponding confidence sets.

Causal Inference counterfactual

Causal isotonic calibration for heterogeneous treatment effects

1 code implementation27 Feb 2023 Lars van der Laan, Ernesto Ulloa-Pérez, Marco Carone, Alex Luedtke

We propose causal isotonic calibration, a novel nonparametric method for calibrating predictors of heterogeneous treatment effects.

Adversarial Meta-Learning of Gamma-Minimax Estimators That Leverage Prior Knowledge

2 code implementations10 Dec 2020 Hongxiang Qiu, Alex Luedtke

Bayes estimators are well known to provide a means to incorporate prior knowledge that can be expressed in terms of a single prior distribution.

Meta-Learning

Discussion of Kallus (2020) and Mo, Qi, and Liu (2020): New Objectives for Policy Learning

no code implementations9 Oct 2020 Sijia Li, Xiudi Li, Alex Luedtke

We discuss the thought-provoking new objective functions for policy learning that were proposed in "More efficient policy learning via optimal retargeting" by Nathan Kallus and "Learning optimal distributionally robust individualized treatment rules" by Weibin Mo, Zhengling Qi, and Yufeng Liu.

Adversarial Monte Carlo Meta-Learning of Optimal Prediction Procedures

1 code implementation26 Feb 2020 Alex Luedtke, Incheoul Chung, Oleg Sofrygin

The Predictor's objective is to learn a function that maps from a new feature to an estimate of the associated outcome.

Meta-Learning

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