Dennis and I wrote about analysing the information flow on StackOverflow with Quicksilver and Moose. We'll present the work at the Social Software Engineering workshop (co-located with FSE) this month.

The article is online: http://scg.unibe.ch/archive/papers/Sche13a-GeolocatingStackOverflow.pdf. I've also written a short blog post about it: http://mir.lu/post/56413508099/mapping-knowledge-transfer

Cheers,

M.