Try this! Researchers devise better recommendation algorithm

The recommendation systems at websites such as Amazon and Netflix use a technique called “collaborative filtering.” To determine what products a given customer might like, they look for other customers who have assigned similar ratings to a similar range of products, and extrapolate from there.The success of this approach depends vitally on the notion of similarity. Most recommendation systems use a measure called cosine similarity, which seems to work well in practice. Last year, at