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Role of Selective Interaction in Wealth Distribution

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  • Abhijit Kar Gupta

Abstract

In our simplified description `wealth' is money ($m$). A kinetic theory of gas like model of money is investigated where two agents interact (trade) selectively and exchange some amount of money between them so that sum of their money is unchanged and thus total money of all the agents remains conserved. The probability distributions of individual money ($P(m)$ vs. $m$) is seen to be influenced by certain ways of selective interactions. The distributions shift away from Boltzmann-Gibbs like exponential distribution and in some cases distributions emerge with power law tails known as Pareto's law ($P(m) \propto m^{-(1+\alpha)}$). Power law is also observed in some other closely related conserved and discrete models. A discussion is provided with numerical support to have a dig into the emergence of power laws in such models.

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  • Abhijit Kar Gupta, 2005. "Role of Selective Interaction in Wealth Distribution," Papers physics/0509172, arXiv.org.
    • Handle: RePEc:arx:papers:physics/0509172
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    Cited by:

    1. Tao Yang & Qianqian Li & Xingang Xia & Erbo Zhao & Guo Liu & Zhangang Han, 2011. "How Long Can You Enjoy Blackjack With 100 Chips?," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 22(10), pages 1161-1171.

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