fredag 10 februari 2017

How to devise the perfect recommendation algorithm

Spotify, a music-streaming service, offers a different model with its Discover Weekly playlist, which it produces for more than 100m customers. It analyses billions of users’ playlists to find songs that others with similar interests have liked. These tracks are combined into a playlist of 30 songs (perhaps including some familiar as well as new ones) delivered each Monday.
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Music lends itself well to this treatment. Streaming services have catalogues of around 30m songs each, compared with mere thousands of film and TV titles. And songs, unlike films, are short enough for a poor recommendation not to matter much. Spotify’s experience shows that algorithms can occasionally nudge people away from hits and expand their horizons.
http://www.economist.com/news/special-report/21716464-recommendations-must-be-neither-too-familiar-nor-too-novel-how-devise-perfect

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