Pareto law of the expenditure of a person in convenience stores
arXiv:0710.1432 · doi:10.1016/j.physa.2008.01.059
Abstract
We study the statistical laws of the expenditure of a person in convenience stores by analysing around 100 million receipts. The density function of expenditure exhibits a fat tail that follows a power law. We observe the Pareto principle where both the top 25% and 2% of the customers account for 80% and 25% of the store's sales, respectively. Using the Lorenz curve, the Gini coefficient is estimated to be 0.70; this implies a strong economic inequality.
8 pages, 3 figures, Proceedings of APFA6