I have a data set of user rating for movie as
user_name, product_name, user_rating
and I am using this data to recommend new movie to user (collaborative filtering).
I also have another data set which show relationships between user like
user_1, CO_WORKER, user_2 user_1, FATHER_OF, user_3 user_3, FRIEND_OF, user_4 etc
Now what are the ways to include 'relationship data' along with 'ratings data' to produce better recommendations ?
example : user_1 might like the movies which user_2 likes since they are co_workers