I'm not sure which is which in your example- I'm guessing that you mean the person searching GOOG is more likely to buy, but nevertheless I think the only one t

I'm not sure which is which in your example- I'm guessing that you mean the person searching GOOG is more likely to buy, but nevertheless I think the only one that applies to entirely is Amazon. The percent of searches in which I am trying to buy something is quite small on Google. Even if I am in the market, I am doing background research on the web. When I'm ready to buy I most often go to Amazon (even if I don't buy from them I still check). On Amazon, when I search I have my wallet out.