Continuum and Thermodynamic Limits for a Wealth-Distribution Model
Continuum and Thermodynamic Limits for a Wealth-Distribution Model
复制标题
财富分配模型的连续体和热力学极限
DOI:
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发表时间:
2020
期刊:
影响因子:
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通讯作者:
E. Scalas
中科院分区:
文献类型:
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作者:
Bertram Düring;N. Georgiou;S. Merino;E. Scalas
We discuss a simple random exchange model for the distribution of wealth. There are N agents, each one endowed with a fraction of the total wealth; indebtedness is not possible, so wealth fractions are positive random variables. At each step, two agents are randomly selected, their wealths are first merged and then randomly split into two parts. We start from a discrete state space, discrete time version of this model and, under suitable scaling, we present its functional convergence to a continuous space, discrete time model. Then, we discuss how a continuous time version of the one-point marginal Markov chain functionally converges to a kinetic equation of Boltzmann type. Solutions to this equation are presented and they coincide with the appropriate limits of the invariant measure for the marginal Markov chain. In this way, in this simple case, we complete Boltzmann’s programme of deriving kinetic equations from random dynamics.
影响因子:
1.4
作者:
Düring B
通讯作者:
Düring B