Tuning degree distributions of scale-free networks

Details Tuning degree distributions of scale-free networks Tuning degree distributions of scale-free networks

2006-02-22

arxiv.org/abs/physics/0602152v2

Physics

Data Analysis, Statistics and Probability

13 pages, 5 figures. Submitted to Physical Review E; references added, intro rewritten

Scientific paper

10.1016/j.physa.2007.04.058

Scale-free networks are characterized by a degree distribution with power-law behavior and have been shown to arise in many areas, ranging from the World Wide Web to transportation or social networks. Degree distributions of observed networks, however, often differ from the power-law type and data based investigations require modifications of the typical scale-free network. We present an algorithm that generates networks in which the skewness of the degree distribution is tuneable by modifying the preferential attachment step of the Barabasi-Albert construction algorithm. Skewness is linearly correlated with the maximal degree of the network and, therefore, adequately represents the influence of superspreaders or hubs. By combining our algorithm with work of Holme and Kim, we show how to generate networks with skewness gamma and clustering coefficient kappa, over a wide range of values.

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