caine - 9:54 pm on May 20, 2003 (gmt 0)

yes and no. i would readdress that analogy, to go a little more this way, does user a, b, c who are putting in extremely competitive terms, though more browsing, as valuable as specific terms from d & e, who are more likely to buy.

To complicate it more, their is no particular way of breaking down which engine a, b, c will use compared to d and e. All i can say is a, b, c are heavy traffic - minimal return, d & e - very good return - minimal traffic.

Obviously knowing search traffic for the engine's as a whole, and the geo usage by country can be targetted for, but 1 user on one engine (say teoma could be a buyer), and ten users on say G could be browsers. Obviously an illustration than a fact, but its very hard to predict via PPC, which is more valuable, hence i list in all knowing that my more competitive kw's will mean less ROI, and more specific kw's mean more on aggregate.