Previous analysis

I did some numerical analysis on the number of active contributors on the largest Wikipedias in April. The most interesting thing I noticed was that there was two groups of Wikipedias. First there was one group that grew exponentially until somewhere around 2007, and then plateaued (some peaked before they plateued, and some may be in decline but its not obvious to tell). Then there was a second group of Wikipedias that still are in an exponential growth phase.

I think it is striking how similar the growth patterns shows to be once they have been normalized against the current number of active contributors.

Back then I posted my results in this thread.

Dear Dafer45, Thanks for your link, I have added it to previous research on Editor Trends Study.