Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2003-12-19
Proc. Nat. Acad. Sci. USA 102, 7794-7799 (2005)
Physics
Condensed Matter
Disordered Systems and Neural Networks
Revised version
Scientific paper
10.1073/pnas.0407994102
We analyze the global structure of the world-wide air transportation network, a critical infrastructure with an enormous impact on local, national, and international economies. We find that the world-wide air transportation network is a scale-free small-world network. In contrast to the prediction of scale-free network models, however, we find that the most connected cities are not necessarily the most central, resulting in anomalous values of the centrality. We demonstrate that these anomalies arise because of the multi-community structure of the network. We identify the communities in the air transportation network and show that the community structure cannot be explained solely based on geographical constraints, and that geo-political considerations have to be taken into account. We identify each city's global role based on its pattern of inter- and intra-community connections, which enables us to obtain scale-specific representations of the network.
Amaral Luis A. N.
Guimera Roger
Mossa Stefano
Turtschi A.
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