no code implementations • 24 Oct 2023 • Noveen Sachdeva, Lequn Wang, Dawen Liang, Nathan Kallus, Julian McAuley
To address these challenges, we introduce the Policy Convolution (PC) family of estimators.
no code implementations • 13 Jun 2023 • Lequn Wang, Akshay Krishnamurthy, Aleksandrs Slivkins
We consider offline policy optimization (OPO) in contextual bandits, where one is given a fixed dataset of logged interactions.
1 code implementation • 30 May 2022 • Lequn Wang, Thorsten Joachims
To this end, motivated by recent advances in uncertainty quantification, we propose two threshold-policy selection rules that can provide distribution-free and finite-sample guarantees on fairness in first-stage recommenders.
1 code implementation • 2 Feb 2022 • Lequn Wang, Thorsten Joachims, Manuel Gomez Rodriguez
Many selection processes such as finding patients qualifying for a medical trial or retrieval pipelines in search engines consist of multiple stages, where an initial screening stage focuses the resources on shortlisting the most promising candidates.
1 code implementation • 28 Jan 2022 • Eleni Straitouri, Lequn Wang, Nastaran Okati, Manuel Gomez Rodriguez
In this work, we develop an automated decision support system that, by design, does not require experts to understand when to trust the system to improve performance.
no code implementations • 3 Mar 2021 • Lequn Wang, Yiwei Bai, Wen Sun, Thorsten Joachims
Contextual bandit algorithms have become widely used for recommendation in online systems (e. g. marketplaces, music streaming, news), where they now wield substantial influence on which items get exposed to the users.
no code implementations • 4 Oct 2020 • Lequn Wang, Thorsten Joachims
The algorithm optimizes user and item fairness as a convex optimization problem which can be solved optimally.
no code implementations • 28 Sep 2019 • Felix Wu, Boyi Li, Lequn Wang, Ni Lao, John Blitzer, Kilian Q. Weinberger
This paper introduces Integrated Triaging, a framework that prunes almost all context in early layers of a network, leaving the remaining (deep) layers to scan only a tiny fraction of the full corpus.
2 code implementations • 28 Feb 2019 • Felix Wu, Boyi Li, Lequn Wang, Ni Lao, John Blitzer, Kilian Q. Weinberger
In this technical report, we introduce FastFusionNet, an efficient variant of FusionNet [12].
no code implementations • 6 Nov 2018 • Yi Su, Lequn Wang, Michele Santacatterina, Thorsten Joachims
In addition, it is sub-differentiable such that it can be used for learning, unlike the SWITCH estimator.
1 code implementation • CVPR 2018 • Yan Wang, Lequn Wang, Yurong You, Xu Zou, Vincent Chen, Serena Li, Gao Huang, Bharath Hariharan, Kilian Q. Weinberger
Not all people are equally easy to identify: color statistics might be enough for some cases while others might require careful reasoning about high- and low-level details.
Ranked #12 on Person Re-Identification on CUHK03 detected