Situating Recommender Systems in Practice: Towards Inductive Learning and Incremental Updates

• URL: http://arxiv.org/abs/2211.06365v1
• Date: Fri, 11 Nov 2022 17:29:35 GMT
• Title: Situating Recommender Systems in Practice: Towards Inductive Learning and Incremental Updates
• Authors: Tobias Schnabel, Mengting Wan, Longqi Yang
• Abstract summary: We formalize both concepts and contextualize recommender systems work from the last six years. We then discuss why and how future work should move towards inductive learning and incremental updates for recommendation model design and evaluation.
• Score: 9.47821118140383
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: With information systems becoming larger scale, recommendation systems are a topic of growing interest in machine learning research and industry. Even though progress on improving model design has been rapid in research, we argue that many advances fail to translate into practice because of two limiting assumptions. First, most approaches focus on a transductive learning setting which cannot handle unseen users or items and second, many existing methods are developed for static settings that cannot incorporate new data as it becomes available. We argue that these are largely impractical assumptions on real-world platforms where new user interactions happen in real time. In this survey paper, we formalize both concepts and contextualize recommender systems work from the last six years. We then discuss why and how future work should move towards inductive learning and incremental updates for recommendation model design and evaluation. In addition, we present best practices and fundamental open challenges for future research.

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