Search Results for author: Aurélien Bibaut

Found 4 papers, 1 papers with code

Demistifying Inference after Adaptive Experiments

no code implementations2 May 2024 Aurélien Bibaut, Nathan Kallus

Adaptive experiments such as multi-arm bandits adapt the treatment-allocation policy and/or the decision to stop the experiment to the data observed so far.

valid

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

The Relative Performance of Ensemble Methods with Deep Convolutional Neural Networks for Image Classification

1 code implementation5 Apr 2017 Cheng Ju, Aurélien Bibaut, Mark J. Van Der Laan

In this work, we investigated multiple widely used ensemble methods, including unweighted averaging, majority voting, the Bayes Optimal Classifier, and the (discrete) Super Learner, for image recognition tasks, with deep neural networks as candidate algorithms.

General Classification Image Classification +3

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