Physics – Physics and Society
Scientific paper
2005-09-21
Physics
Physics and Society
9 pages,5 figures
Scientific paper
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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