PNAS has an interesting paper: Until now I had believed that the major search engines provide some kind of self-enforcing loops as they show web sites first that are already highly visited. Visitors of these prime websites will then know (and link) only these websites giving them even a higher rank (rich-get-richer). But that does not see to be true. Nay, Nay. The use of search engines actually had an egalitarian effect as shown by empirical and theoretical arguments. On the other hand I can not renember an own paper, that would have received more than 50 citations without being in an “upper-class” journal. Did you ever want ot know how Google works? Check Ghemawat S GH, Leung S-T: The Google file system. ACM, SOSP’03, October 19-22,2003, Bolton Landing, New York.