Your Friends Are More Interesting Than You - Paper from ICWSM 2013
A recent paper  at ICWSM 2013 (The International AAAI Conference on Weblogs and Social Media) discussed the Friend Paradox: on average, you friends have more friends than you. The Friend Paradox theory can be traced back to a paper in 1991 . The ICWSM paper re-examed the theory using a Twitter dataset.
The authors checked some variants of "Friend Paradox" on Twitter: (1) On average, your followees ( or followers) have more followers than you do; (2) On average, your followees (or followers) have more followees than you do. I think it's pretty easy to understand why your followees have more followers and followees. People tend to follow active users or famous people. But why my followers have more followers than me (everyone got an active followers) ?
 check this link here: Friendship Paradox Redux: Your Friends Are More Interesting Than You
 Feld, S. L. 1991. Why Your Friends Have More Friends Than You Do. American Journal of Sociology 96(6):1464—1477.