Subject: implicit data relative ratings


Here is an interesting paper that claims that implicit rankings based on
logging requests for directions are at least as good as explicit ratings and
ten times more available.

http://www.vldb.org/pvldb/vol4/p290-venetis.pdf

My bias in favor of implicit ratings just got
stronger.<http://www.vldb.org/pvldb/vol4/p290-venetis.pdf>