Whether we’re using Spotify, Amazon, Netflix or Instagram, we encounter algorithms that recommend ... The first, “collaborative filtering,” is based on ratings by other users with similar ...

All filtering algorithms operate on human input, and some are much more reliant on humans than others. Web search engines look at the links between pages, links that were put there by people.

To include this long tail, Amazon developed collaborative filtering, which to this day ... out that Amazon had inadvertently trained its algorithms to recommend safe bets. In the case of Prime ...