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  1. GENNEXT: The Next Generation of IR and Recommender Systems with Language Agents, Generative Models, and Conversational AI

    Article • July 2025, ACM (Association for Computing Machinery)

    Pablo Castells

  2. Toward Holistic Evaluation of Recommender Systems Powered by Generative Models

    Article • July 2025, ACM (Association for Computing Machinery)

    Nikhil Mehta, Pablo Castells

  3. Impression-Aware Recommender Systems

    Article • ACM Transactions on Recommender Systems, April 2025, ACM (Association for Computing Machinery)

    Fernando Benjamín Pérez Maurera, Pablo Castells, Paolo Cognome

  4. Introduction to the Special Issue on Trustworthy Recommender Systems

    Article • ACM Transactions on Recommender Systems, November 2024, ACM (Association for Computing Machinery)

    Pablo Castells

  5. The 1st International Workshop on Risks, Opportunities, and Evaluation of Generative Models in Recommendation (ROEGEN)

    Article • October 2024, ACM (Association for Computing Machinery)

    Pablo Castells

  6. Temporal Conformity-aware Hawkes Graph Network for Recommendations

    Article • May 2024, ACM (Association for Computing Machinery)

    Chenglong Ma, Pablo Castells, Yongli Ren, Mark Sanderson

  7. Report on the Workshop on Learning and Evaluating Recommendations with Impressions (LERI) at RecSys 2023

    Article • ACM SIGIR Forum, December 2023, ACM (Association for Computing Machinery)

    Pablo Castells, Paolo Cognome

  8. Workshop on Learning and Evaluating Recommendations with Impressions (LERI)

    Article • September 2023, ACM (Association for Computing Machinery)

    Pablo Castells, Paolo Cognome

  9. NEST

    Article • October 2022, ACM (Association for Computing Machinery)

    Yongli Ren, Mark Sanderson, Chenglong Ma, Pablo Castells

  10. Fast online evaluation method for search ranking algorithms

    Article • October 2022, ACM (Association for Computing Machinery)

    Nan Bi, Pablo Castells

  11. How Collaborative Filtering Behaves When Groups of Users Suddenly Shift Preference?

    Article • July 2022, ACM (Association for Computing Machinery)

    Pablo Castells, Mark Sanderson, Yongli Ren, Chenglong Ma

  12. Human Preferences as Dueling Bandits

    Article • July 2022, ACM (Association for Computing Machinery)

    Ellen Voorhees, Pablo Castells

  13. RELISON: A Framework for Link Recommendation in Social Networks

    Article • July 2022, ACM (Association for Computing Machinery)

    Pablo Castells

  14. SimuRec: Workshop on Synthetic Data and Simulation Methods for Recommender Systems Research

    Article • September 2021, ACM (Association for Computing Machinery)

    Pablo Castells, Robin Burke

  15. Popularity Bias in False-positive Metrics for Recommender Systems Evaluation

    Article • ACM Transactions on Information Systems, July 2021, ACM (Association for Computing Machinery)

    Elisa Mena-Maldonado, Pablo Castells, Yongli Ren, Mark Sanderson

  16. On Target Item Sampling in Offline Recommender System Evaluation

    Article • September 2020, ACM (Association for Computing Machinery)

    Pablo Castells

  17. Metrics Disagreement in Recommender Systems Evaluation

    Article • July 2020, ACM (Association for Computing Machinery)

    Elisa Mena-Maldonado, Yongli Ren, Pablo Castells, Mark Sanderson

  18. Multi-armed recommender system bandit ensembles

    Article • September 2019, ACM (Association for Computing Machinery)

    Pablo Castells

  19. Structural Novelty and Diversity in Link Prediction

    Article • January 2018, ACM (Association for Computing Machinery)

    Pablo Castells