Before revision:  The effect of competition in a growing economic system on the evolution of  unequal share of wealth is also analyzed and discussed, showing the necessity of increase of inequalities under the premisesof growth and competition .
After revision:  The effect of competition in a growing economic system on the evolution of unequal share of wealth under the premises of growth and competition, it is shown that the increase of inequalities under the premisesof growth and competition .