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The mean-field approximation model of company's income growth

✍ Scribed by Takayuki Mizuno; Misako Takayasu; Hideki Takayasu

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
244 KB
Volume
332
Category
Article
ISSN
0378-4371

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✦ Synopsis

We introduce a mean-ΓΏeld-type approximation for description of company's income statistics. Utilizing huge company data we show that a discrete version of Langevin equation with additive and multiplicative noises can appropriately describe the time evolution of a company's income uctuation in statistical sense. The Zipf's law of income distribution is shown to be held in a steady-sate widely, and country dependence of income distribution can also be nicely implemented in our numerical simulation.

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