This morning Danah Boyd published an interesting enquiry into online clickthrough advertising: Who clicks on ads? And what might this mean? on her blog, apophenia. The crux of the question stems from the fact that most “savvy” internet users routinely deny ever clicking on ads, and not just loosely-targeted banner ads but contextual text ads as well. The difficult paradox, then, may be that the population of “clickers” may be composed of groups that are well outside the target audience of the advertising, which would call the whole model into question. The most important fact in the piece, though, has to do with the question that there isn’t much data available to test any hypothesis in this area.