This is one i`ve been thinking about myself, as I now have campaigns from Adwords, MSN and Yahoo sending traffic to one site, and need to know which ones are making the sales.
I don't think theres a way to do it with Analytics, as you don't have enough control (although if anyone knows otherwise please let me know!).
My idea to do it was to have a url parameter for the target url for each campaign eg
Code:
http://www.mysite.co.uk/index.php?campaign=adwords
Then, on the landing page, you would grab the campaign variable and put it in a cookie or session variable.
I would then use this data to dynamically build affiliate links, to fill in the tracking part of the url eg
Code:
http://scripts.affiliatefuture.com/AFClick.asp?affiliateID=xxxx&merchantID=xxxx&programmeID=xxx&mediaID=0&tracking=*campaign*&url=http://www.merchantsite.co.uk/
This *tracking* variable should then be carried through the merchants network and attributed to the sale, so you should be able to see it when you look at your list of sales in the networks backend.
I haven't actually tested this, its only what i`ve come up with in my head, and plan to implement it this week, but I can't see that it wouldn't work.
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