Discernment of Hubs and Clusters in Socioeconomic Networks

Details Discernment of Hubs and Clusters in Socioeconomic Networks Discernment of Hubs and Clusters in Socioeconomic Networks

2008-07-10

arxiv.org/abs/0807.1550v3

Physics

Physics and Society

17 pages, small mathematical expression for the probability 0.973469 now correctly written (mid. p. 9)

Scientific paper

Interest in the analysis of networks has grown rapidly in the new millennium. Consequently, we promote renewed attention to a certain methodological approach introduced in 1974. Over the succeeding decade, this two-stage--double-standardization and hierarchical clustering (single-linkage-like)--procedure was applied to a wide variety of weighted, directed networks of a socioeconomic nature, frequently revealing the presence of ``hubs''. These were, typically--in the numerous instances studied of migration flows between geographic subdivisions within nations--``cosmopolitan/non-provincial'' areas, a prototypical example being the French capital, Paris. Such locations emit and absorb people broadly across their respective nations. Additionally, the two-stage procedure--which ``might very well be the most successful application of cluster analysis'' (R. C. Dubes, 1985)--detected many (physically or socially) isolated, functional groups (regions) of areas, such as the southern islands, Shikoku and Kyushu, of Japan, the Italian islands of Sardinia and Sicily, and the New England region of the United States. Further, we discuss a (complementary) approach developed in 1976, in which the max-flow/min-cut theorem was applied to raw/non-standardized (interindustry, as well as migration) flows.

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