1 code implementation • 15 May 2022 • Shimeng Huang, Elisabeth Ailer, Niki Kilbertus, Niklas Pfister
We propose KernelBiome, a kernel-based nonparametric regression and classification framework for compositional data.
no code implementations • 17 Mar 2022 • Niklas Pfister, Jonas Peters
Exogenous heterogeneity, for example, in the form of instrumental variables can help us learn a system's underlying causal structure and predict the outcome of unseen intervention experiments.
1 code implementation • 12 Feb 2022 • Sebastian Weichwald, Søren Wengel Mogensen, Tabitha Edith Lee, Dominik Baumann, Oliver Kroemer, Isabelle Guyon, Sebastian Trimpe, Jonas Peters, Niklas Pfister
Questions in causality, control, and reinforcement learning go beyond the classical machine learning task of prediction under i. i. d.
1 code implementation • 3 Feb 2022 • Sorawit Saengkyongam, Leonard Henckel, Niklas Pfister, Jonas Peters
Most of the existing estimators assume that the error term in the response Y and the hidden confounders are uncorrelated with the instruments Z.
1 code implementation • 1 Jun 2021 • Sorawit Saengkyongam, Nikolaj Thams, Jonas Peters, Niklas Pfister
We view the environmental shift problem through the lens of causality and propose multi-environment contextual bandits that allow for changes in the underlying mechanisms.
1 code implementation • 12 Jun 2020 • Rune Christiansen, Niklas Pfister, Martin Emil Jakobsen, Nicola Gnecco, Jonas Peters
We introduce the formal framework of distribution generalization that allows us to analyze the above problem in partially observed nonlinear models for both direct interventions on $X$ and interventions that occur indirectly via exogenous variables $A$.
Methodology Primary 62Gxx, secondary 62G35, 62G08, 62D20
no code implementations • 17 Jan 2020 • Jonas Peters, Stefan Bauer, Niklas Pfister
In this chapter, we provide a natural and straight-forward extension of this concept to dynamical systems, focusing on continuous time models.
Methodology Dynamical Systems
1 code implementation • 5 Nov 2019 • Niklas Pfister, Evan G. Williams, Jonas Peters, Ruedi Aebersold, Peter Bühlmann
In particular, it is useful to distinguish between stable and unstable predictors, i. e., predictors which have a fixed or a changing functional dependence on the response, respectively.
Methodology Applications
no code implementations • 28 Oct 2018 • Niklas Pfister, Stefan Bauer, Jonas Peters
Results on both simulated and real-world examples suggest that learning the structure of kinetic systems benefits from a causal perspective.
3 code implementations • 4 Jun 2018 • Niklas Pfister, Sebastian Weichwald, Peter Bühlmann, Bernhard Schölkopf
We introduce coroICA, confounding-robust independent component analysis, a novel ICA algorithm which decomposes linearly mixed multivariate observations into independent components that are corrupted (and rendered dependent) by hidden group-wise stationary confounding.
no code implementations • 1 Mar 2016 • Niklas Pfister, Peter Bühlmann, Bernhard Schölkopf, Jonas Peters
Based on an empirical estimate of dHSIC, we define three different non-parametric hypothesis tests: a permutation test, a bootstrap test and a test based on a Gamma approximation.