I'm wondering if anybody has done a definitive study on the conversion value of a "click" on google versus Facebook, both in terms of brand recognition, immedia

I'm wondering if anybody has done a definitive study on the conversion value of a "click" on google versus Facebook, both in terms of brand recognition, immediate conversion (purchase), and long term conversion (delayed purchase) Probably not, but it sounds like a fun weekend project. I think you just gave me something to do this weekend :D Thanks