Abstract
The evolution problem of individual wealth growth and control is investigated by applying the kinetic theory. The microscopic variation of individual wealth growth around a universal desired target is analyzed by discussing a suitable value function, which characterizes the internal trading mechanism. Inheritance, capital gifts from others, and capital gains from rising prices are treated as external mechanisms that result in the growth of individual wealth. Under the grazing collision limit, the steady-state solution of the Fokker–Planck type equation is the product of an inverse gamma distribution and a generalized inverse gamma distribution, and exhibits a fat-tailed property. To prevent the excessive growth of individual wealth, we design additive and multiplicative controls, which reduce the possibility of excessive growth of individual wealth.
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Acknowledgements
This research is supported by the National Natural Science Foundation of China (No. 11471263). The authors are very grateful to the reviewers for their helpful and valuable comments, which have led to a meaningful improvement of the paper.
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Communicated by Pierpaolo Vivo.
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Zhou, X., Lai, S. A Kinetic Description of Individual Wealth Growth and Control. J Stat Phys 188, 30 (2022). https://doi.org/10.1007/s10955-022-02961-z
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DOI: https://doi.org/10.1007/s10955-022-02961-z