Long tail Recommender Systems
noun phrase
Definition: The part of a distribution consisting of many infrequent items/events, which collectively can be important despite low individual frequency [Anderson 2004].
Example in context: “Especially in applications with noisy data, amplifying genuine outliers along with the long tail produces improved performance in the long tail, at the expense of average performance (Moniz et al., 2017).” [Thuremella, Kunze 2023]
Related terms: tail distribution, rare classes, class imbalance