2022

Breaking Feedback Loops in Recommender Systems with Causal Inference

Krauth, Karl, Wang, Yixin, Jordan, Michael I.

Understand

Recommender systems play a key role in shaping modern web ecosystems.

  • These systems alternate between (1) making recommendations (2) collecting user responses to these recommendations, and (3) retraining the recommendation algorithm based on this feedback.
  • During this process the recommender system influences the user behavioral data that is subsequently used to update it, thus creating a feedback loop.
  • Recent work has shown that feedback loops may compromise recommendation quality and homogenize user behavior, raising ethical and performance concerns when deploying recommender systems.

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