Academics probe Twitter habits

A new study out of the Harvard Business School, takes a look at Twitter the newest, yet to make money, social networking craze. While the study finds some interesting gendered impacts (men are more likely to follow other men), I'm struck by the graphic below of how concentrated Twitter production is.

The study finds that 90 percent of tweets come from the top 10 percent of users. They compare this to 30 percent of content production by the same share of other social networks.

One possible explanation is that Twitter allows few types of content. Other networks like Myspace or Facebook allow posting of music, photos (which twitter does allow), or surveys. 

Twitter is also at a different stage of development than more mature networks.