Hello once again, I really appreciate all your comments in this topic. Recently I found an article that suits my request a little better than the others: Stutzman F. An Evaluation of Identity-Sharing Behavior in Social Network Communities (www.ibiblio.org/fred/pubs/stutzman_pub4.pdf) It doesn't relate the topic of validity of the personal data in social networks like Facebook, but it at least concernes the problem of students attitude to identity sharing. So, I need more papers of this kind. Perhaps someone tried to compare smth like political views of Facebook users with data on political views and preferences of a more general offline sample, or something of that kind? I'm simply interested how such data, given in social network profiles differs from that one given in offline surveys. And which one is more valid? Has anybody seen something like this? Thanks in advance. -- Alexander Semenov. MA student Faculty of Sociology Moscow School of Social and Economic Sciences (MSSES) http://www.msses.ru/English/index.html