And news item tracking helps model spread of information.
I just wanted to post a link to this article (in German) about the very same study ...
http://www.spiegel.de/wissenschaft/mensch/...,397303,00.html... when I saw your message. Of course I then copied "your" URL and pasted it to the eurobilltracker forum, hehe. Interesting project, though I wonder about the validity of the data found.
Christian