Well, "geography" apparently answers the question as to how to get more ad clicks. Not sure it had much to with the original question though, aside from the fact that we choose a job because it's there, for some relative value of there.
I think you totally missed the point: geography generated higher clicks on this ad because people were overwhelmingly more interested in the location of a job than what it was for.
Because Diabetes AutoMeters Inc™ that Raganwald thinks should get the engineering energy isn't located in the valley, it won't attract engineers from the valley. Similarly, because so many ad-driven companies are in the valley, many of the engineers that want to be (or already are) in the valley tend to end up working on advertising stuff.
