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Weighted Trade Network in a Model of Preferential Bipartite Transactions

  • Abhijit Chakraborty
  • S. S. Manna
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    Using a model of wealth distribution where traders are characterized by quenched random saving propensities and trade among themselves by bipartite transactions, we mimic the enhanced rates of trading of the rich by introducing the preferential selection rule using a pair of continuously tunable parameters. The bipartite trading defines a growing trade network of traders linked by their mutual trade relationships. With the preferential selection rule this network appears to be highly heterogeneous characterized by the scale-free nodal degree and the link weight distributions and presents signatures of non-trivial strength-degree correlations. With detailed numerical simulations and using finite-size scaling analysis we present evidence that the associated critical exponents are continuous functions of the tuning parameters. However the wealth distribution has been observed to follow the well-known Pareto law robustly for all positive values of the tuning parameters.

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    File URL: http://arxiv.org/pdf/0909.3984
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    Paper provided by arXiv.org in its series Papers with number 0909.3984.

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    Date of creation: Sep 2009
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    Handle: RePEc:arx:papers:0909.3984
    Contact details of provider: Web page: http://arxiv.org/

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