  We consider an ideal closed stock market, in which 100 traders have economic
activities. The assets of the traders change through buying and selling stocks.
We simulate the assets under conservation of both total currency and total
number of stocks. If the traders are identical, then the assets are distributed
as a stationary Gaussian. When variety among the traders makes winners and
losers, the asset distribution displays power law scaling such as the Pareto
law. We discuss this power law scaling from the point of view of
superstatistics. It is given as a superposition of scaled distributions for
each hierarchical level. The various traders have the same growth rate
distribution to keep the scaling.
