Search Results for author: Ivana Malenica

Found 8 papers, 0 papers with code

Kernel Debiased Plug-in Estimation: Simultaneous, Automated Debiasing without Influence Functions for Many Target Parameters

no code implementations14 Jun 2023 Brian Cho, Yaroslav Mukhin, Kyra Gan, Ivana Malenica

In the problem of estimating target parameters in nonparametric models with nuisance parameters, substituting the unknown nuisances with nonparametric estimators can introduce "plug-in bias."

Multi-task Highly Adaptive Lasso

no code implementations27 Jan 2023 Ivana Malenica, Rachael V. Phillips, Daniel Lazzareschi, Jeremy R. Coyle, Romain Pirracchio, Mark J. Van Der Laan

We propose a novel, fully nonparametric approach for the multi-task learning, the Multi-task Highly Adaptive Lasso (MT-HAL).

Multi-Task Learning

Adaptive Sequential Surveillance with Network and Temporal Dependence

no code implementations5 Dec 2022 Ivana Malenica, Jeremy R. Coyle, Mark J. Van Der Laan, Maya L. Petersen

Our causal target parameter is the mean latent outcome we would have obtained after one time-step, if, starting at time t given the observed past, we had carried out a stochastic intervention that maximizes the outcome under a resource constraint.

Personalized Online Machine Learning

no code implementations21 Sep 2021 Ivana Malenica, Rachael V. Phillips, Romain Pirracchio, Antoine Chambaz, Alan Hubbard, Mark J. Van Der Laan

In this work, we introduce the Personalized Online Super Learner (POSL) -- an online ensembling algorithm for streaming data whose optimization procedure accommodates varying degrees of personalization.

BIG-bench Machine Learning Time Series +1

Adaptive Sequential Design for a Single Time-Series

no code implementations29 Jan 2021 Ivana Malenica, Aurelien Bibaut, Mark J. Van Der Laan

The current work is motivated by the need for robust statistical methods for precision medicine; as such, we address the need for statistical methods that provide actionable inference for a single unit at any point in time.

Time Series Time Series Analysis

Targeting Learning: Robust Statistics for Reproducible Research

no code implementations12 Jun 2020 Jeremy R. Coyle, Nima S. Hejazi, Ivana Malenica, Rachael V. Phillips, Benjamin F. Arnold, Andrew Mertens, Jade Benjamin-Chung, Weixin Cai, Sonali Dayal, John M. Colford Jr., Alan E. Hubbard, Mark J. Van Der Laan

Targeted Learning is a subfield of statistics that unifies advances in causal inference, machine learning and statistical theory to help answer scientifically impactful questions with statistical confidence.

Causal Inference Survival Analysis

More Efficient Off-Policy Evaluation through Regularized Targeted Learning

no code implementations13 Dec 2019 Aurélien F. Bibaut, Ivana Malenica, Nikos Vlassis, Mark J. Van Der Laan

We study the problem of off-policy evaluation (OPE) in Reinforcement Learning (RL), where the aim is to estimate the performance of a new policy given historical data that may have been generated by a different policy, or policies.

Causal Inference Off-policy evaluation

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