no code implementations • 31 Mar 2025 • Bruno Deprez, Wei Wei, Wouter Verbeke, Bart Baesens, Kevin Mets, Tim Verdonck
Research on continual graph learning for AML, however, is still scarce.
1 code implementation • 12 Dec 2024 • Simon De Vos, Christopher Bockel-Rickermann, Stefan Lessmann, Wouter Verbeke
One common approach involves two steps: first, an inference step that estimates conditional average treatment effects (CATEs), and second, an optimization step that ranks entities based on their CATE values and assigns treatment to the top k within a given budget.
1 code implementation • 30 Sep 2024 • Daan Caljon, Jente Van Belle, Jeroen Berrevoets, Wouter Verbeke
In Influence Maximization (IM), the objective is to -- given a budget -- select the optimal set of entities in a network to target with a treatment so as to maximize the total effect.
1 code implementation • 26 Sep 2024 • Daan Caljon, Jeff Vercauteren, Simon De Vos, Wouter Verbeke, Jente Van Belle
Rolling origin forecast instability refers to variability in forecasts for a specific period induced by updating the forecast when new data points become available.
1 code implementation • 12 Jun 2024 • Christopher Bockel-Rickermann, Toon Vanderschueren, Tim Verdonck, Wouter Verbeke
We apply this scheme to eight popular CADR estimators on four widely-used benchmark datasets, running nearly 1, 500 individual experiments.
1 code implementation • 29 May 2024 • Bruno Deprez, Toon Vanderschueren, Bart Baesens, Tim Verdonck, Wouter Verbeke
We conclude that most research relies on expert-based rules and manual features, while deep learning methods have been gaining traction.
Ranked #1 on
Fraud Detection
on Elliptic Dataset
1 code implementation • European Actuarial Journal 2024 • Bruno Deprez, Félix Vandervorst, Wouter Verbeke, Bart Baesens, Tim Verdonck
However, network analytics has only recently been applied to fraud detection in the actuarial literature.
no code implementations • 3 May 2024 • Toon Vanderschueren, Wouter Verbeke, Felipe Moraes, Hugo Manuel Proença
We propose an alternative approach based on learning to rank.
1 code implementation • 21 Sep 2023 • Théo Verhelst, Robin Petit, Wouter Verbeke, Gianluca Bontempi
Despite the growing popularity of machine-learning techniques in decision-making, the added value of causal-oriented strategies with respect to pure machine-learning approaches has rarely been quantified in the literature.
1 code implementation • 7 Sep 2023 • Christopher Bockel-Rickermann, Toon Vanderschueren, Jeroen Berrevoets, Tim Verdonck, Wouter Verbeke
Estimating a unit's responses to interventions with an associated dose, the "conditional average dose response" (CADR), is relevant in a variety of domains, from healthcare to business, economics, and beyond.
no code implementations • 7 Sep 2023 • Christopher Bockel-Rickermann, Sam Verboven, Tim Verdonck, Wouter Verbeke
In lending, where prices are specific to both customers and products, having a well-functioning personalized pricing policy in place is essential to effective business making.
1 code implementation • 7 Jun 2023 • Toon Vanderschueren, Alicia Curth, Wouter Verbeke, Mihaela van der Schaar
Machine learning (ML) holds great potential for accurately forecasting treatment outcomes over time, which could ultimately enable the adoption of more individualized treatment strategies in many practical applications.
no code implementations • 7 Jun 2023 • Hans Weytjens, Wouter Verbeke, Jochen De Weerdt
Our contribution consists of experiments on timed process interventions with synthetic data that renders genuine online RL and the comparison to CI possible, and allows for an accurate evaluation of the results.
1 code implementation • 28 Apr 2023 • Vincent Scheltjens, Lyse Naomi Wamba Momo, Wouter Verbeke, Bart De Moor
In this work, we address the step prior to the initiation of a federated network for model training, client recruitment.
no code implementations • 7 Dec 2022 • Christopher Bockel-Rickermann, Tim Verdonck, Wouter Verbeke
In addition, we build a framework for fraud analytical methods and propose a keywording strategy for future research.
no code implementations • 3 Jun 2022 • Toon Vanderschueren, Robert Boute, Tim Verdonck, Bart Baesens, Wouter Verbeke
This work proposes to relax both assumptions by learning the effect of maintenance conditional on a machine's characteristics from observational data on similar machines using existing methodologies for causal inference.
no code implementations • 9 Feb 2022 • Toon Vanderschueren, Bart Baesens, Tim Verdonck, Wouter Verbeke
A central problem in business concerns the optimal allocation of limited resources to a set of available tasks, where the payoff of these tasks is inherently uncertain.
no code implementations • 5 Jan 2021 • Diego Olaya, Wouter Verbeke, Jente Van Belle, Marie-Anne Guerry
In this article, we therefore extend upon the expected value framework and formally introduce a cost-sensitive decision boundary for double binary causal classification, which is a linear function of the estimated individual treatment effect, the positive outcome probability and the cost and benefit parameters of the problem setting.
1 code implementation • 5 Jan 2021 • Jakob Raymaekers, Wouter Verbeke, Tim Verdonck
We present the results of a series of experiments in a fraud detection setting, which illustrate the effectiveness of the presented approach.
no code implementations • 26 Aug 2020 • Sam Verboven, Muhammad Hafeez Chaudhary, Jeroen Berrevoets, Wouter Verbeke
Multi-task learning (MTL) can improve performance on a task by sharing representations with one or more related auxiliary-tasks.
no code implementations • 24 Jul 2020 • Wouter Verbeke, Diego Olaya, Jeroen Berrevoets, Sam Verboven, Sebastián Maldonado
The framework is shown to instantiate to application-specific cost-sensitive performance measures that have been recently proposed for evaluating customer retention and response uplift models, and allows to maximize profitability when adopting a causal classification model for optimizing decision-making.
no code implementations • 14 Jul 2020 • George Petrides, Wouter Verbeke
Over the years, a plethora of cost-sensitive methods have been proposed for learning on data when different types of misclassification errors incur different costs.
1 code implementation • 5 May 2020 • Sebastiaan Höppner, Bart Baesens, Wouter Verbeke, Tim Verdonck
Fraud detection is to be acknowledged as an instance-dependent cost-sensitive classification problem, where the costs due to misclassification vary between instances, and requiring adapted approaches for learning a classification model.
Applications
no code implementations • 3 May 2020 • Sam Verboven, Jeroen Berrevoets, Chris Wuytens, Bart Baesens, Wouter Verbeke
However, few data-driven tools that support strategic decision-making are available.
no code implementations • 14 Feb 2020 • Floris Devriendt, Tias Guns, Wouter Verbeke
We propose a unified formalisation of different global uplift modeling measures in use today and explore how these can be integrated into the learning-to-rank framework.
1 code implementation • 16 Oct 2019 • Jeroen Berrevoets, Sam Verboven, Wouter Verbeke
Applying causal inference models in areas such as economics, healthcare and marketing receives great interest from the machine learning community.
1 code implementation • 1 Feb 2019 • Jeroen Berrevoets, Wouter Verbeke
Hence, methods are being developed that are able to learn from newly gained experience, as well as handle drifting environments.