Observations: Scale-free 10 10 The in-degree distribution of Japan The out-degree distribution of Wikipedia.(adopted from Fig. 3 in Japan Wikipedia.(adopted from f11) Fig 3 in ref[ 1].) Reference [1V. Zlatic, M. Bozicevic, H Stefancic, and M. Domazet, Wikipedias: Collaborative Web-based Encyclopedias as Complex Networks", Physical Review E 74, 016615, 2006.88 Observations: Scale-free The in-degree distribution of Japan Wikipedia. (adopted from Fig. 3 in ref[1].) Reference [1] V. Zlatic, M. Bozicevic, H. Stefancic, and M. Domazet, “Wikipedias: Collaborative Web-based Encyclopedias as Complex Networks”, Physical Review E 74, 016615, 2006. The out-degree distribution of Japan Wikipedia. (adopted from Fig. 3 in ref[1].)