Search Results for author: Virginie Do

Found 10 papers, 2 papers with code

Contextual bandits with concave rewards, and an application to fair ranking

no code implementations18 Oct 2022 Virginie Do, Elvis Dohmatob, Matteo Pirotta, Alessandro Lazaric, Nicolas Usunier

We consider Contextual Bandits with Concave Rewards (CBCR), a multi-objective bandit problem where the desired trade-off between the rewards is defined by a known concave objective function, and the reward vector depends on an observed stochastic context.

Fairness Multi-Armed Bandits

Fast online ranking with fairness of exposure

no code implementations13 Sep 2022 Nicolas Usunier, Virginie Do, Elvis Dohmatob

In this paper, we propose the first efficient online algorithm to optimize concave objective functions in the space of rankings which applies to every concave and smooth objective function, such as the ones found for fairness of exposure.

Fairness Recommendation Systems

Optimizing generalized Gini indices for fairness in rankings

no code implementations2 Apr 2022 Virginie Do, Nicolas Usunier

Depending on these weights, GGFs minimize the Gini index of item exposure to promote equality between items, or focus on the performance on specific quantiles of least satisfied users.

Fairness Recommendation Systems

Online Selection of Diverse Committees

no code implementations19 May 2021 Virginie Do, Jamal Atif, Jérôme Lang, Nicolas Usunier

Citizens' assemblies need to represent subpopulations according to their proportions in the general population.

e-ViL: A Dataset and Benchmark for Natural Language Explanations in Vision-Language Tasks

2 code implementations ICCV 2021 Maxime Kayser, Oana-Maria Camburu, Leonard Salewski, Cornelius Emde, Virginie Do, Zeynep Akata, Thomas Lukasiewicz

e-ViL is a benchmark for explainable vision-language tasks that establishes a unified evaluation framework and provides the first comprehensive comparison of existing approaches that generate NLEs for VL tasks.

Language Modelling Text Generation

Online certification of preference-based fairness for personalized recommender systems

no code implementations29 Apr 2021 Virginie Do, Sam Corbett-Davies, Jamal Atif, Nicolas Usunier

We propose to audit for envy-freeness, a more granular criterion aligned with individual preferences: every user should prefer their recommendations to those of other users.

Fairness Multi-Armed Bandits +1

e-SNLI-VE: Corrected Visual-Textual Entailment with Natural Language Explanations

3 code implementations7 Apr 2020 Virginie Do, Oana-Maria Camburu, Zeynep Akata, Thomas Lukasiewicz

The recently proposed SNLI-VE corpus for recognising visual-textual entailment is a large, real-world dataset for fine-grained multimodal reasoning.

Multimodal Reasoning Natural Language Inference

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