Ueno, Hiromichi; Watanabe, Tsutomu; Takayasu, Hideki; … - In: Physica A: Statistical Mechanics and its Applications 390 (2011) 3, pp. 499-504
By analyzing a huge amount of point-of-sale data collected from Japanese supermarkets, we find power law relationships between price and sales numbers. The estimated values of the exponents of these power laws depend on the category of products; however, they are independent of the stores,...