2004 ACM International Conference on Information and Knowledge Management (CIKM '04)
November 8-13, 2004, Washington D.C., USA

Taxonomy-driven Computation of Product Recommendations

Cai-Nicolas Ziegler, Georg Lausen, Lars Schmidt-Thieme


Recommender systems have been subject to an enormous rise in popularity and research interest over the last ten years. At the same time, very large taxonomies for product classification are becoming increasingly prominent among e-commerce systems for diverse domains, rendering detailed machine-readable content descriptions feasible. Amazon.com makes use of an entire plethora of hand-crafted taxonomies classifying books, movies, apparel, and various other goods. We exploit such taxonomic background knowledge for the computation of personalized recommendations. Hereby, relationships between super-concepts and sub-concepts constitute an important cornerstone of our novel approach, providing powerful inference opportunities for profile generation based upon the classification of products that customers have chosen. Ample empirical analysis, both offline and online, demonstrates our proposal's superiority over common existing approaches when user information becomes sparse and implicit ratings prevail.

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