Hi Jan,
I think that we may have given you a lot more than you had in mind when you asked your question. I'm aware that you were thinking of "power law" in a way that can be very different than "power dynamics", but I have the latter more on my mind, partially because of recent discussions on Wikimedia-l related to strategy.
I remain interested in knowing what the goal of your research is.
I'll be busy with non-Wikimedia activities for the next few days, but I'll try to get back to the Wikiverse by this Saturday. If you don't hear back from me after about two weeks then please feel free to email me off list if you'd like me to follow up. In the meantime, Kerry and other capable people may be able to help with any further questions regarding your research interests.
Best wishes,