Facebook, Twitter users are affluent and urban, study shows

If you're hooked on posting updates on Facebook and Twitter, there's a good chance you have more money and are more urban than your fellow U.S. citizens, according to a new study by The Nielsen Co. In fact, Facebook users are more affluent than their social networking counterparts on Myspace, the study showed. And bloggers and Twitterers tend to live in urban areas.

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