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• W2891769835 abstract "We study a stochastic $N$-particle system representing economic agents in a population randomly exchanging their money, which is associated to a class of one-dimensional kinetic equations modelling the evolution of the distribution of wealth in a simple market economy, introduced by Matthes and Toscani cite{matthes-toscani2008}. We show that, unless the economic exchanges satisfy some exact conservation condition, the $p$-moments of the particles diverge with time for all $p>1$, and converge to 0 for $0<p<1$. This establishes a qualitative difference with the kinetic equation, whose solution is known to have bounded $p$-moments, for all $p$ smaller than the Pareto index of the equilibrium distribution. On the other hand, the case of strictly conservative economies is fully treated: using probabilistic coupling techniques, we obtain stability results for the particle system, such as propagation of moments, exponential equilibration, and uniform (in time) propagation of chaos with explicit rate of order $N^{-1/3}$." @default.
• W2891769835 created "2018-09-27" @default.
• W2891769835 creator A5034786998 @default.
• W2891769835 date "2018-09-14" @default.
• W2891769835 modified "2023-09-27" @default.
• W2891769835 title "Particle system approach to wealth redistribution" @default.
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• W2891769835 hasPublicationYear "2018" @default.
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