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Fitness-dependent topological properties of the World Trade Web

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  • D. Garlaschelli
  • M. I. Loffredo
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    Abstract

    Among the proposed network models, the hidden variable (or good get richer) one is particularly interesting, even if an explicit empirical test of its hypotheses has not yet been performed on a real network. Here we provide the first empirical test of this mechanism on the world trade web, the network defined by the trade relationships between world countries. We find that the power-law distributed gross domestic product can be successfully identified with the hidden variable (or fitness) determining the topology of the world trade web: all previously studied properties up to third-order correlation structure (degree distribution, degree correlations and hierarchy) are found to be in excellent agreement with the predictions of the model. The choice of the connection probability is such that all realizations of the network with the same degree sequence are equiprobable.

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    File URL: http://arxiv.org/pdf/cond-mat/0403051
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    Bibliographic Info

    Paper provided by arXiv.org in its series Papers with number cond-mat/0403051.

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    Date of creation: Mar 2004
    Date of revision: Oct 2004
    Publication status: Published in Phys. Rev. Lett. 93, 188701 (2004).
    Handle: RePEc:arx:papers:cond-mat/0403051

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    Web page: http://arxiv.org/

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