The authors study the effect of changes in the U.S. income distribution on assortment size in the mainstream grocery channel. Census demographics for 1,711 counties are matched to local assortment data from Nielsen in 944 grocery product categories from 2007 to 2013. The authors show that –...

Due to customer segmentation, multiple types of dynamic business scenarios (business-as-usual, escalation, hysteresis, and evolving business practice; Dekimpe and Hanssens 1999) may co-exist within a single product market. The authors develop an approach to model this phenomenon with time series...