Search Results for author: Mark van der Laan

Found 11 papers, 2 papers with code

Longitudinal Targeted Minimum Loss-based Estimation with Temporal-Difference Heterogeneous Transformer

no code implementations5 Apr 2024 Toru Shirakawa, Yi Li, Yulun Wu, Sky Qiu, YuXuan Li, Mingduo Zhao, Hiroyasu Iso, Mark van der Laan

We propose Deep Longitudinal Targeted Minimum Loss-based Estimation (Deep LTMLE), a novel approach to estimate the counterfactual mean of outcome under dynamic treatment policies in longitudinal problem settings.

counterfactual Epidemiology +1

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

Lassoed Tree Boosting

no code implementations22 May 2022 Alejandro Schuler, Yi Li, Mark van der Laan

Gradient boosting performs exceptionally in most prediction problems and scales well to large datasets.

regression

Risk Minimization from Adaptively Collected Data: Guarantees for Supervised and Policy Learning

no code implementations NeurIPS 2021 Aurélien Bibaut, Antoine Chambaz, Maria Dimakopoulou, Nathan Kallus, Mark van der Laan

Empirical risk minimization (ERM) is the workhorse of machine learning, whether for classification and regression or for off-policy policy learning, but its model-agnostic guarantees can fail when we use adaptively collected data, such as the result of running a contextual bandit algorithm.

regression

Post-Contextual-Bandit Inference

no code implementations NeurIPS 2021 Aurélien Bibaut, Antoine Chambaz, Maria Dimakopoulou, Nathan Kallus, Mark van der Laan

The adaptive nature of the data collected by contextual bandit algorithms, however, makes this difficult: standard estimators are no longer asymptotically normally distributed and classic confidence intervals fail to provide correct coverage.

valid

Estimation of population size based on capture recapture designs and evaluation of the estimation reliability

no code implementations12 May 2021 Yue You, Mark van der Laan, Philip Collender, Qu Cheng, Alan Hubbard, Nicholas P Jewell, Zhiyue Tom Hu, Robin Mejia, Justin Remais

We cover models assuming a single constraint (identification assumption) on the K-dimensional distribution such that the target quantity is identified and the statistical model is unrestricted.

The Optimal Dynamic Treatment Rule SuperLearner: Considerations, Performance, and Application

no code implementations29 Jan 2021 Lina Montoya, Mark van der Laan, Alexander Luedtke, Jennifer Skeem, Jeremy Coyle, Maya Petersen

Additionally, we highlight practical choices when implementing the algorithm, including choice of candidate algorithms, metalearners to combine the candidates, and risk functions to select the best combination of algorithms.

Applications

Performance and Application of Estimators for the Value of an Optimal Dynamic Treatment Rule

no code implementations29 Jan 2021 Lina Montoya, Jennifer Skeem, Mark van der Laan, Maya Petersen

In this paper, we study the performance of estimators that approximate the true value of: 1) an $a$ $priori$ known dynamic treatment rule 2) the true, unknown optimal dynamic treatment rule (ODTR); 3) an estimated ODTR, a so-called "data-adaptive parameter," whose true value depends on the sample.

Methodology Applications

Nonparametric Bootstrap Inference for the Targeted Highly Adaptive LASSO Estimator

1 code implementation23 May 2019 Weixin Cai, Mark van der Laan

In order to optimize the finite sample coverage of the nonparametric bootstrap confidence intervals, we propose a selection method for this sectional variation norm that is based on running the nonparametric bootstrap for all values of the sectional variation norm larger than the one selected by cross-validation, and subsequently determining a value at which the width of the resulting confidence intervals reaches a plateau.

Statistics Theory Methodology Statistics Theory

Finite Sample Inference for Targeted Learning

no code implementations30 Aug 2017 Mark van der Laan

It relies on an initial estimator (HAL-MLE) of the nuisance parameters by minimizing the empirical risk over the parameter space under the constraint that sectional variation norm is bounded by a constant, where this constant can be selected with cross-validation.

Statistics Theory Statistics Theory

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