Search Results for author: Tobias Hatt

Found 12 papers, 10 papers with code

Interpretable Off-Policy Learning via Hyperbox Search

1 code implementation4 Mar 2022 Daniel Tschernutter, Tobias Hatt, Stefan Feuerriegel

Using a simulation study, we demonstrate that our algorithm outperforms state-of-the-art methods from interpretable off-policy learning in terms of regret.

Estimating average causal effects from patient trajectories

1 code implementation2 Mar 2022 Dennis Frauen, Tobias Hatt, Valentyn Melnychuk, Stefan Feuerriegel

In medical practice, treatments are selected based on the expected causal effects on patient outcomes.

Estimating Conditional Average Treatment Effects with Missing Treatment Information

1 code implementation2 Mar 2022 Milan Kuzmanovic, Tobias Hatt, Stefan Feuerriegel

Although this is a widespread problem in practice, CATE estimation with missing treatments has received little attention.

Domain Adaptation

Combining Observational and Randomized Data for Estimating Heterogeneous Treatment Effects

1 code implementation25 Feb 2022 Tobias Hatt, Jeroen Berrevoets, Alicia Curth, Stefan Feuerriegel, Mihaela van der Schaar

While observational data is confounded, randomized data is unconfounded, but its sample size is usually too small to learn heterogeneous treatment effects.

Representation Learning

Deconfounding Temporal Autoencoder: Estimating Treatment Effects over Time Using Noisy Proxies

1 code implementation6 Dec 2021 Milan Kuzmanovic, Tobias Hatt, Stefan Feuerriegel

To this end, we develop the Deconfounding Temporal Autoencoder, a novel method that leverages observed noisy proxies to learn a hidden embedding that reflects the true hidden confounders.

Decision Making valid

Generalizing Off-Policy Learning under Sample Selection Bias

no code implementations2 Dec 2021 Tobias Hatt, Daniel Tschernutter, Stefan Feuerriegel

Since training data is often not representative of the target population, standard policy learning methods may yield policies that do not generalize target population.

Selection bias

Sequential Deconfounding for Causal Inference with Unobserved Confounders

1 code implementation16 Apr 2021 Tobias Hatt, Stefan Feuerriegel

In this paper, we develop the Sequential Deconfounder, a method that enables estimating individualized treatment effects over time in presence of unobserved confounders.

Causal Inference Decision Making

AttDMM: An Attentive Deep Markov Model for Risk Scoring in Intensive Care Units

1 code implementation9 Feb 2021 Yilmazcan Özyurt, Mathias Kraus, Tobias Hatt, Stefan Feuerriegel

In this work, we propose a novel generative deep probabilistic model for real-time risk scoring in ICUs.

Estimating Average Treatment Effects via Orthogonal Regularization

1 code implementation21 Jan 2021 Tobias Hatt, Stefan Feuerriegel

In this paper, we propose a novel regularization framework for estimating average treatment effects that exploits unconfoundedness.

Decision Making

Estimating Treatment Effects via Orthogonal Regularization

no code implementations1 Jan 2021 Tobias Hatt, Stefan Feuerriegel

Based on our regularization framework, we develop deep orthogonal networks for unconfounded treatments (DONUT) which learn outcomes that are orthogonal to the treatment assignment.

Causal Inference Decision Making

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