Search Results for author: Jean-Michel Loubes

Found 37 papers, 12 papers with code

Fair Graph Neural Network with Supervised Contrastive Regularization

no code implementations9 Apr 2024 Mahdi Tavassoli Kejani, Fadi Dornaika, Jean-Michel Loubes

In recent years, Graph Neural Networks (GNNs) have made significant advancements, particularly in tasks such as node classification, link prediction, and graph representation.

counterfactual Fairness +2

Debiasing Machine Learning Models by Using Weakly Supervised Learning

no code implementations23 Feb 2024 Renan D. B. Brotto, Jean-Michel Loubes, Laurent Risser, Jean-Pierre Florens, Kenji Nose-Filho, João M. T. Romano

In our work, we then propose a bias mitigation strategy for continuous sensitive variables, based on the notion of endogeneity which comes from the field of econometrics.

Econometrics Weakly-supervised Learning

Hoeffding decomposition of black-box models with dependent inputs

no code implementations10 Oct 2023 Marouane Il Idrissi, Nicolas Bousquet, Fabrice Gamboa, Bertrand Iooss, Jean-Michel Loubes

The elements of this decomposition can be expressed using oblique projections and allow for novel interpretability indices for evaluation and variance decomposition purposes.

Uncertainty Quantification

Are fairness metric scores enough to assess discrimination biases in machine learning?

no code implementations8 Jun 2023 Fanny Jourdan, Laurent Risser, Jean-Michel Loubes, Nicholas Asher

This paper presents novel experiments shedding light on the shortcomings of current metrics for assessing biases of gender discrimination made by machine learning algorithms on textual data.

Fairness

How optimal transport can tackle gender biases in multi-class neural-network classifiers for job recommendations?

no code implementations27 Feb 2023 Fanny Jourdan, Titon Tshiongo Kaninku, Nicholas Asher, Jean-Michel Loubes, Laurent Risser

To anticipate the certification of recommendation systems using textual data, we then used it on the Bios dataset, for which the learning task consists in predicting the occupation of female and male individuals, based on their LinkedIn biography.

Multi-class Classification Recommendation Systems

When Mitigating Bias is Unfair: A Comprehensive Study on the Impact of Bias Mitigation Algorithms

1 code implementation14 Feb 2023 Natasa Krco, Thibault Laugel, Jean-Michel Loubes, Marcin Detyniecki

With comparable performances in fairness and accuracy, are the different bias mitigation approaches impacting a similar number of individuals?

Fairness

Gaussian Processes on Distributions based on Regularized Optimal Transport

no code implementations12 Oct 2022 François Bachoc, Louis Béthune, Alberto Gonzalez-Sanz, Jean-Michel Loubes

We present a novel kernel over the space of probability measures based on the dual formulation of optimal regularized transport.

Gaussian Processes valid

A survey of Identification and mitigation of Machine Learning algorithmic biases in Image Analysis

no code implementations10 Oct 2022 Laurent Risser, Agustin Picard, Lucas Hervier, Jean-Michel Loubes

Contrarily to societal applications where a set of proxy variables can be provided by the common sense or by regulations to draw the attention on potential risks, industrial and safety-critical applications are most of the times sailing blind.

Common Sense Reasoning Fairness

Quantile-constrained Wasserstein projections for robust interpretability of numerical and machine learning models

1 code implementation23 Sep 2022 Marouane Il Idrissi, Nicolas Bousquet, Fabrice Gamboa, Bertrand Iooss, Jean-Michel Loubes

Numerical experiments on real case studies, from the UQ and ML fields, highlight the computational feasibility of such studies and provide local and global insights on the robustness of black-box models to input perturbations.

Uncertainty Quantification

An improved central limit theorem and fast convergence rates for entropic transportation costs

no code implementations19 Apr 2022 Eustasio del Barrio, Alberto Gonzalez-Sanz, Jean-Michel Loubes, Jonathan Niles-Weed

We prove a central limit theorem for the entropic transportation cost between subgaussian probability measures, centered at the population cost.

valid

GAN Estimation of Lipschitz Optimal Transport Maps

no code implementations16 Feb 2022 Alberto González-Sanz, Lucas de Lara, Louis Béthune, Jean-Michel Loubes

This paper introduces the first statistically consistent estimator of the optimal transport map between two probability distributions, based on neural networks.

Generative Adversarial Network

Fairness constraint in Structural Econometrics and Application to fair estimation using Instrumental Variables

no code implementations16 Feb 2022 Samuele Centorrino, Jean-Pierre Florens, Jean-Michel Loubes

A {\it fair} solution is obtained by projecting the unconstrained index into the null space of this operator or by directly finding the closest solution of the functional equation into this null space.

BIG-bench Machine Learning Econometrics +1

Transport-based Counterfactual Models

1 code implementation30 Aug 2021 Lucas de Lara, Alberto González-Sanz, Nicholas Asher, Laurent Risser, Jean-Michel Loubes

We address the problem of designing realistic and feasible counterfactuals in the absence of a causal model.

Causal Inference counterfactual +1

Diversity-Preserving K-Armed Bandits, Revisited

no code implementations5 Oct 2020 Hédi Hadiji, Sébastien Gerchinovitz, Jean-Michel Loubes, Gilles Stoltz

We consider the bandit-based framework for diversity-preserving recommendations introduced by Celis et al. (2019), who approached it in the case of a polytope mainly by a reduction to the setting of linear bandits.

The statistical effect of entropic regularization in optimal transportation

no code implementations9 Jun 2020 Eustasio del Barrio, Jean-Michel Loubes

We propose to tackle the problem of understanding the effect of regularization in Sinkhorn algotihms.

Review of Mathematical frameworks for Fairness in Machine Learning

no code implementations26 May 2020 Eustasio del Barrio, Paula Gordaliza, Jean-Michel Loubes

A review of the main fairness definitions and fair learning methodologies proposed in the literature over the last years is presented from a mathematical point of view.

BIG-bench Machine Learning Fairness +1

Projection to Fairness in Statistical Learning

no code implementations24 May 2020 Thibaut Le Gouic, Jean-Michel Loubes, Philippe Rigollet

In the context of regression, we consider the fundamental question of making an estimator fair while preserving its prediction accuracy as much as possible.

Fairness regression

Minimax optimal goodness-of-fit testing for densities and multinomials under a local differential privacy constraint

no code implementations11 Feb 2020 Joseph Lam-Weil, Béatrice Laurent, Jean-Michel Loubes

To the best of our knowledge, we provide the first minimax optimal test and associated private transformation under a local differential privacy constraint over Besov balls in the continuous setting, quantifying the price to pay for data privacy.

Tackling Algorithmic Bias in Neural-Network Classifiers using Wasserstein-2 Regularization

no code implementations15 Aug 2019 Laurent Risser, Alberto Gonzalez Sanz, Quentin Vincenot, Jean-Michel Loubes

We then introduce in this paper a new method to temper the algorithmic bias in Neural-Network based classifiers.

optimalFlow: Optimal-transport approach to flow cytometry gating and population matching

1 code implementation18 Jul 2019 Eustasio del Barrio, Hristo Inouzhe, Jean-Michel Loubes, Carlos Matrán, Agustín Mayo-Íscar

We also present $optimalFlowClassification$, which uses a database of gated cytometries and optimalFlowTemplates to assign cell types to a new cytometry.

Attraction-Repulsion clustering with applications to fairness

1 code implementation10 Apr 2019 Eustasio del Barrio, Hristo Inouzhe, Jean-Michel Loubes

We consider the problem of diversity enhancing clustering, i. e, developing clustering methods which produce clusters that favour diversity with respect to a set of protected attributes such as race, sex, age, etc.

Clustering Fairness

Explaining Machine Learning Models using Entropic Variable Projection

2 code implementations18 Oct 2018 François Bachoc, Fabrice Gamboa, Max Halford, Jean-Michel Loubes, Laurent Risser

In order to emphasize the impact of each input variable, this formalism uses an information theory framework that quantifies the influence of all input-output observations based on entropic projections.

BIG-bench Machine Learning

Can everyday AI be ethical. Fairness of Machine Learning Algorithms

no code implementations3 Oct 2018 Philippe Besse, Celine Castets-Renard, Aurelien Garivier, Jean-Michel Loubes

Combining big data and machine learning algorithms, the power of automatic decision tools induces as much hope as fear.

BIG-bench Machine Learning Fairness

Confidence Intervals for Testing Disparate Impact in Fair Learning

2 code implementations17 Jul 2018 Philippe Besse, Eustasio del Barrio, Paula Gordaliza, Jean-Michel Loubes

We provide the asymptotic distribution of the major indexes used in the statistical literature to quantify disparate treatment in machine learning.

BIG-bench Machine Learning

Obtaining fairness using optimal transport theory

1 code implementation8 Jun 2018 Eustasio del Barrio, Fabrice Gamboa, Paula Gordaliza, Jean-Michel Loubes

\textit{Fairness} is generally studied in a probabilistic framework where it is assumed that there exists a protected variable, whose use as an input of the algorithm may imply discrimination.

Statistics Theory Statistics Theory 62H30, 68T01

COREclust: a new package for a robust and scalable analysis of complex data

no code implementations25 May 2018 Camille Champion, Anne-Claire Brunet, Jean-Michel Loubes, Laurent Risser

In this paper, we present a new R package COREclust dedicated to the detection of representative variables in high dimensional spaces with a potentially limited number of observations.

Clustering Graph Clustering

Gaussian Processes indexed on the symmetric group: prediction and learning

no code implementations16 Mar 2018 François Bachoc, Baptiste Broto, Fabrice Gamboa, Jean-Michel Loubes

In the framework of the supervised learning of a real function defined on a space X , the so called Kriging method stands on a real Gaussian field defined on X.

Gaussian Processes

Deep Learning applied to Road Traffic Speed forecasting

no code implementations2 Oct 2017 Thomas Epelbaum, Fabrice Gamboa, Jean-Michel Loubes, Jessica Martin

In this paper, we propose deep learning architectures (FNN, CNN and LSTM) to forecast a regression model for time dependent data.

regression

A Gaussian Process Regression Model for Distribution Inputs

no code implementations31 Jan 2017 François Bachoc, Fabrice Gamboa, Jean-Michel Loubes, Nil Venet

We prove that the Gaussian processes indexed by distributions corresponding to these kernels can be efficiently forecast, opening new perspectives in Gaussian process modeling.

BIG-bench Machine Learning Gaussian Processes +1

Big Data analytics. Three use cases with R, Python and Spark

no code implementations30 Sep 2016 Philippe Besse, Brendan Guillouet, Jean-Michel Loubes

Management and analysis of big data are systematically associated with a data distributed architecture in the Hadoop and now Spark frameworks.

Collaborative Filtering Management +1

Destination Prediction by Trajectory Distribution Based Model

no code implementations10 May 2016 Philippe C. Besse, Brendan Guillouet, Jean-Michel Loubes, Francois Royer

We present how this model can be used to predict the final destination of a new trajectory based on their first locations using a two step procedure: We first assign the new trajectory to the clusters it mot likely belongs.

Clustering

Review and Perspective for Distance Based Trajectory Clustering

1 code implementation20 Aug 2015 Philippe Besse, Brendan Guillouet, Jean-Michel Loubes, Royer François

Using clustering technics based on the choice of a distance between the observations, we first provide a comprehensive review of the different distances used in the literature to compare trajectories.

Clustering Trajectory Clustering

Cannot find the paper you are looking for? You can Submit a new open access paper.