Mizuno, Takayuki; Toriyama, Masahiro; Terano, Takao; … - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 15, pp. 3931-3935
We study the statistical laws of the expenditure of a person in convenience stores by analyzing around 100 million receipts. The density function of expenditure exhibits a fat tail that follows a power law. Using the Lorenz curve, the Gini coefficient is estimated to be 0.70; this implies that...