Abstract
Two types of the growth rate distributions are observed in the analyses of economic data.
The growth rate distributions such as profits can be approximated by linear functions on a log–log scale.
The growth rate distributions such as sales are difficult to approximate by linear functions because the
distributions with a curvature have fat tails. These two types of the distributions have been derived by
numerical simulations. By a multiplicative stochastic process, profits types variables have been generated.
By superposing the variables not to be negative, sales type variables have been generated.
