TheMadScientist - 10:26 pm on Jan 13, 2013 (gmt 0) [edited by: TheMadScientist at 10:44 pm (utc) on Jan 13, 2013]
Try this again, because I think I can say it better:
Look at the behavior signals in the results.
Look at the behavior of searchers after they left the results on sites where you have access to the data.
Put the two together to find the behavior signals in the results that indicate 'positive off site experience' via external sources.
Write an algo that increases the rankings of 'positive off site experience signals' based on 'visitor activity in the results', because then it applies to the entire index and every visitor, not just sites/pages or visitors you have information from...
Sure, you look at the 'external behavior' of visitors when you have access, but you use it to find the behavior of visitors in the results indicating the 'end result' was positive and you write an algo for it, because then it applies the the entire index and every visitor, not only sites or visitors you have access to 'extra information' on.
[edited by: TheMadScientist at 10:44 pm (utc) on Jan 13, 2013]