The Social Science Research Network (or SSRN) is one of the main repositories of working papers in the social sciences. I discovered today that it now carries ads.
Here is an example of one of the more popular of my papers hosted on SSRN. You'll notice the Google Adsense links on the right hand side. It contains ads for risk analysis and even photocopying. An interesting mix for a paper on regulated pricing for access to infrastructure.
More amusingly are the number of Melbourne bicycle ads for my paper on "Markets for Ownership" but also an ad for the Macquarie Graduate School of Management linked to my paper on "Operationalizing Value-Based Business Strategy."
I only mention this to complement some of my earlier posts on the expanding domain of ads (especially the idea that books might contain them). After all, if they can be linked to relatively obscure academic papers can there really be any limits to their domain?