Search Results for author: Alexandre Gilotte

Found 7 papers, 1 papers with code

Repeated Bidding with Dynamic Value

no code implementations3 Aug 2023 Benjamin Heymann, Alexandre Gilotte, Rémi Chan-Renous

We consider a repeated auction where the buyer's utility for an item depends on the time that elapsed since his last purchase.

Learning from aggregated data with a maximum entropy model

1 code implementation5 Oct 2022 Alexandre Gilotte, Ahmed Ben Yahmed, David Rohde

Aggregating a dataset, then injecting some noise, is a simple and common way to release differentially private data. However, aggregated data -- even without noise -- is not an appropriate input for machine learning classifiers. In this work, we show how a new model, similar to a logistic regression, may be learned from aggregated data only by approximating the unobserved feature distribution with a maximum entropy hypothesis.

regression

Fast Offline Policy Optimization for Large Scale Recommendation

no code implementations8 Aug 2022 Otmane Sakhi, David Rohde, Alexandre Gilotte

Personalised interactive systems such as recommender systems require selecting relevant items from massive catalogs dependent on context.

Recommendation Systems

Lessons from the AdKDD'21 Privacy-Preserving ML Challenge

no code implementations31 Jan 2022 Eustache Diemert, Romain Fabre, Alexandre Gilotte, Fei Jia, Basile Leparmentier, Jérémie Mary, Zhonghua Qu, Ugo Tanielian, Hui Yang

Designing data sharing mechanisms providing performance and strong privacy guarantees is a hot topic for the Online Advertising industry.

Privacy Preserving

Learning from Bandit Feedback: An Overview of the State-of-the-art

no code implementations18 Sep 2019 Olivier Jeunen, Dmytro Mykhaylov, David Rohde, Flavian vasile, Alexandre Gilotte, Martin Bompaire

In order to handle this "bandit-feedback" setting, several Counterfactual Risk Minimisation (CRM) methods have been proposed in recent years, that attempt to estimate the performance of different policies on historical data.

counterfactual Recommendation Systems

Ranking metrics on non-shuffled traffic

no code implementations17 Sep 2019 Alexandre Gilotte

Ranking metrics are a family of metrics largely used to evaluate recommender systems.

Position Recommendation Systems

Offline A/B testing for Recommender Systems

no code implementations22 Jan 2018 Alexandre Gilotte, Clément Calauzènes, Thomas Nedelec, Alexandre Abraham, Simon Dollé

Before A/B testing online a new version of a recommender system, it is usual to perform some offline evaluations on historical data.

counterfactual Product Recommendation +1

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