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Rankings are ubiquitous in the online world today. As we have transitioned from finding books in libraries to ranking products, jobs, job applicants, opinions and potential romantic partners, there is a substantial precedent that ranking…

Information Retrieval · Computer Science 2018-10-18 Ashudeep Singh , Thorsten Joachims

Diffusion-based learning has settled as a rising paradigm in generative recommendation, outperforming traditional approaches built upon variational autoencoders and generative adversarial networks. Despite their effectiveness, concerns have…

Information Retrieval · Computer Science 2025-08-12 Daniele Malitesta , Giacomo Medda , Erasmo Purificato , Mirko Marras , Fragkiskos D. Malliaros , Ludovico Boratto

Traditionally, recommender systems operate by returning a user a set of items, ranked in order of estimated relevance to that user. In recent years, methods relying on stochastic ordering have been developed to create "fairer" rankings that…

Information Retrieval · Computer Science 2022-09-13 Amanda Bower , Kristian Lum , Tomo Lazovich , Kyra Yee , Luca Belli

Recommender systems are one of the most widely used services on several online platforms to suggest potential items to the end-users. These services often use different machine learning techniques for which fairness is a concerning factor,…

Artificial Intelligence · Computer Science 2020-11-11 Aadi Swadipto Mondal , Rakesh Bal , Sayan Sinha , Gourab K Patro

As a highly data-driven application, recommender systems could be affected by data bias, resulting in unfair results for different data groups, which could be a reason that affects the system performance. Therefore, it is important to…

Information Retrieval · Computer Science 2021-04-22 Yunqi Li , Hanxiong Chen , Zuohui Fu , Yingqiang Ge , Yongfeng Zhang

The evaluation of recommender system fairness has become increasingly important, especially with recent legislation that emphasises the development of fair and responsible artificial intelligence. This has led to the emergence of various…

Information Retrieval · Computer Science 2026-04-29 Theresia Veronika Rampisela

Information retrieval (IR) systems often leverage query data to suggest relevant items to users. This introduces the possibility of unfairness if the query (i.e., input) and the resulting recommendations unintentionally correlate with…

Machine Learning · Statistics 2019-09-17 Rinat Khaziev , Bryce Casavant , Pearce Washabaugh , Amy A. Winecoff , Matthew Graham

Existing solutions for bundle recommendation (BR) have achieved remarkable effectiveness for predicting the user's preference for prebuilt bundles. However, bundle-item (B-I) affiliation will vary dynamically in real scenarios. For example,…

Information Retrieval · Computer Science 2026-01-06 Dong Zhang , Lin Li , Ming Li , Amran Bhuiyan , Meng Sun , Xiaohui Tao , Jimmy Xiangji Huang

Efforts in the recommendation community are shifting from the sole emphasis on utility to considering beyond-utility factors, such as fairness and robustness. Robustness of recommendation models is typically linked to their ability to…

Information Retrieval · Computer Science 2024-01-29 Ludovico Boratto , Francesco Fabbri , Gianni Fenu , Mirko Marras , Giacomo Medda

Recommender systems are an essential tool to relieve the information overload challenge and play an important role in people's daily lives. Since recommendations involve allocations of social resources (e.g., job recommendation), an…

Information Retrieval · Computer Science 2022-07-12 Yifan Wang , Weizhi Ma , Min Zhang , Yiqun Liu , Shaoping Ma

We propose a control-theoretic interpretation of recommender systems and use this perspective to analyze how fairness interventions shape long-term system behavior. Fairness concerns arise for both users and creators, ranging from opinion…

Systems and Control · Electrical Eng. & Systems 2026-05-05 Giulia De Pasquale , Sarah Dean , Paolo Frasca

Recently there has been a growing interest in fairness-aware recommender systems, including fairness in providing consistent performance across different users or groups of users. A recommender system could be considered unfair if the…

Information Retrieval · Computer Science 2019-10-17 Himan Abdollahpouri , Masoud Mansoury , Robin Burke , Bamshad Mobasher

Fairness in recommender systems has been considered with respect to sensitive attributes of users (e.g., gender, race) or items (e.g., revenue in a multistakeholder setting). Regardless, the concept has been commonly interpreted as some…

Information Retrieval · Computer Science 2019-08-20 Yashar Deldjoo , Vito Walter Anelli , Hamed Zamani , Alejandro Bellogin , Tommaso Di Noia

Though recommender systems are defined by personalization, recent work has shown the importance of additional, beyond-accuracy objectives, such as fairness. Because users often expect their recommendations to be purely personalized, these…

Information Retrieval · Computer Science 2021-03-17 Nasim Sonboli , Jessie J. Smith , Florencia Cabral Berenfus , Robin Burke , Casey Fiesler

Recently there has been a growing interest in fairness-aware recommender systems including fairness in providing consistent performance across different users or groups of users. A recommender system could be considered unfair if the…

Information Retrieval · Computer Science 2020-08-24 Himan Abdollahpouri , Masoud Mansoury , Robin Burke , Bamshad Mobasher

As a key application of artificial intelligence, recommender systems are among the most pervasive computer aided systems to help users find potential items of interests. Recently, researchers paid considerable attention to fairness issues…

Information Retrieval · Computer Science 2021-04-26 Le Wu , Lei Chen , Pengyang Shao , Richang Hong , Xiting Wang , Meng Wang

Recommender systems underpin many of the personalized services in the online information & social media ecosystem. However, the assumptions in the research on content recommendations in domains like search, video, and music are often…

Social and Information Networks · Computer Science 2024-09-23 Nathan Bartley , Kristina Lerman

Package-to-group recommender systems recommend a set of unified items to a group of people. Different from conventional settings, it is not easy to measure the utility of group recommendations because it involves more than one user. In…

Information Retrieval · Computer Science 2021-12-30 Ryoma Sato

In the basic recommendation paradigm, the most (predicted) relevant item is recommended to each user. This may result in some items receiving lower exposure than they "should"; to counter this, several algorithmic approaches have been…

Information Retrieval · Computer Science 2024-12-06 Sophie Greenwood , Sudalakshmee Chiniah , Nikhil Garg

Ranked lists are frequently used by information retrieval (IR) systems to present results believed to be relevant to the users information need. Fairness is a relatively new but important aspect of these rankings to measure, joining a rich…

Information Retrieval · Computer Science 2022-01-11 Amifa Raj , Michael D. Ekstrand