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Title
Japanese: 
English:Pareto law of the expenditure of a person in convenience stores 
Author
Japanese: Takayuki Mizuno, 鳥山正博, 寺野 隆雄, 高安 美佐子.  
English: Takayuki Mizuno, Masahiro Toriyama, Takao Terano, Misako Takayasu.  
Language English 
Journal/Book name
Japanese: 
English:Physica A 
Volume, Number, Page Vol. 387    No. 15    pp. 3931-3935
Published date June 2008 
Publisher
Japanese: 
English:North-Holland 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVG-4RKTNBH-5&_user=126251&_coverDate=06%2F15%2F2008&_rdoc=20&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235534%232008%23996129984%23687585%23FLA%23display%23Volume)&_cdi=5534&_sort=d&_docanchor=&_ct=31&_acct=C000010218&_version=1&_urlVersion=0&_userid=126251&md5=31a6aa417b0b31bde317a6ab08fc1738
 
DOI https://doi.org/10.1016/j.physa.2008.01.059
Abstract 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 loyal customers contribute significantly to a store’s sales. 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.

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