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Ergodic chaos and aggregate stability: A deterministic discrete-choice model of wealth distribution dynamics


  • Financial support from the Japan Economic Research Foundation and the Japan Society for the Promotion of Science is gratefully acknowledged.



This paper studies wealth distribution dynamics in a small open economy with a continuum of consumers indexed by initial wealth. Each of them solves a discrete-choice problem whose optimal policy function exhibits ergodic chaos. We show that for any initial distribution of wealth given by a density, the wealth distribution converges to a unique invariant distribution, and aggregate wealth converges to the corresponding value. Thus ergodic chaos leads to aggregate stability rather than instability. These results are illustrated with various numerical examples.