Who Writes Wikipedia?

Aaron Swartz's investigation and article into the evolution of Wikipedia content is interesting. The typical '80/20' rule (80 percent of the work is usually done by 20 percent of the people) seems to be upended. Calculating raw content 'volume' (number of bulk letters added instead of number of overall 'edits'), Aaron deduces that Wikipedia is content-managed by the masses, not a core group of about 500, as the Wikipedia founder believes. A good read:  Who Writes Wikipedia? (Aaron Swartz's Raw Thought)