The ideas that are used here are heavily researched. As an example of current work have a look at http://www.eecs.qmul.ac.uk/~laurissa/Laurissas_Pages/Publicati

The ideas that are used here are heavily researched. As an example of current work have a look at http://www.eecs.qmul.ac.uk/~laurissa/Laurissas_Pages/Publications_files/5137a351.pdf http://www.eecs.qmul.ac.uk/~laurissa/Laurissas_Pages/Publica... Most of the challenge is in getting a way of assessing the value of innovations in the algorithms - how do you know how well it works ? Difficult unless you are running a large scale recommender that users can't opt out of (because pop goes your stats if the do!)