Origins of power-law degree distribution in the heterogeneity of human activity in social networks.
Origins of power-law degree distribution in the heterogeneity of human activity in social networks.
复制标题
社交网络中人类活动异质性幂律度分布的起源
DOI:
10.1038/srep01783
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发表时间:
2013
影响因子:
4.6
通讯作者:
Makse, Hernan A.
中科院分区:
文献类型:
--
作者:
Muchnik, Lev;Pei, Sen;Parra, Lucas C.;Reis, Saulo D. S.;Andrade, Jose S., Jr.;Havlin, Shlomo;Makse, Hernan A.
The probability distribution of number of ties of an individual in a social network follows a scale-free power-law. However, how this distribution arises has not been conclusively demonstrated in direct analyses of people's actions in social networks. Here, we perform a causal inference analysis and find an underlying cause for this phenomenon. Our analysis indicates that heavy-tailed degree distribution is causally determined by similarly skewed distribution of human activity. Specifically, the degree of an individual is entirely random - following a “maximum entropy attachment” model - except for its mean value which depends deterministically on the volume of the users' activity. This relation cannot be explained by interactive models, like preferential attachment, since the observed actions are not likely to be caused by interactions with other people.
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影响因子:
4.6
作者:
Gallos LK;Barttfeld P;Havlin S;Sigman M;Makse HA
通讯作者:
Makse HA
DOI:
10.1073/pnas.0902667106
发表时间:
2009-08-04
影响因子:
11.1
作者:
Rybski, Diego;Buldyrev, Sergey V.;Makse, Hernan A.
通讯作者:
Makse, Hernan A.
影响因子:
1.6
作者:
Deng, Weibing;Allahverdyan, Armen E.;Wang, Qiuping A.
通讯作者:
Wang, Qiuping A.
影响因子:
56.9
作者:
Barabási, AL;Albert, R
通讯作者:
Albert, R
影响因子:
64.8
作者:
Huberman, BA;Adamic, LA
通讯作者:
Adamic, LA