Is it smart for retailers to display their wares to customers a few at a time or all at once? The answer depends largely on the product category, according to research by Kris Johnson Ferreira and Joel Goh.

Retailers routinely swap out the products they display to customers. It’s called assortment rotation, and it’s a popular business strategy for many brick-and-mortar and online stores alike. Retailing trends such as “fast fashion” (think Zara and H&M) and “flash sales” (think Rue La La) depend on rapid rotations.

Read more at Harvard Business School