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Revisiting Graph Projections for Effective Complementary Product Recommendation

10 June 2025
Leandro Anghinoni
Pablo Zivic
Jorge Sanchez
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Abstract

Complementary product recommendation is a powerful strategy to improve customer experience and retail sales. However, recommending the right product is not a simple task because of the noisy and sparse nature of user-item interactions. In this work, we propose a simple yet effective method to predict a list of complementary products given a query item, based on the structure of a directed weighted graph projected from the user-item bipartite graph. We revisit bipartite graph projections for recommender systems and propose a novel approach for inferring complementarity relationships from historical user-item interactions. We compare our model with recent methods from the literature and show, despite the simplicity of our approach, an average improvement of +43% and +38% over sequential and graph-based recommenders, respectively, over different benchmarks.

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@article{anghinoni2025_2506.09209,
  title={ Revisiting Graph Projections for Effective Complementary Product Recommendation },
  author={ Leandro Anghinoni and Pablo Zivic and Jorge Adrian Sanchez },
  journal={arXiv preprint arXiv:2506.09209},
  year={ 2025 }
}
Main:7 Pages
4 Figures
Bibliography:2 Pages
4 Tables
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