Big Data in Recommendation Systems

A good overview in KDNuggets.  Example with Amazon books. When you think of it, much of our purchase interaction online is influenced by such systems.  It is important to make the premise for the reco clear to the user.  Our early pump recommendation expert system was a form of this method, but with much less data, and a clear reason for selection.  Also a way to map markets of need.  Look also at Procurement systems.