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Bandits for Recommendation Systems

A common problem for internet-based companies is: which piece of content should we display? Google has this problem (which ad to show), Facebook has this problem (which friend's post to show), and RichRelevance has this problem (which product recommendation to show). Many of the promising solutions come from the study of the multi-armed bandit problem. A one-armed "bandit" is another way to say slot machine (probably because both will leave you with empty pockets).

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