From the comments, on sexist pricing

See Pashigian, B. P.. (1988). Demand Uncertainty and Sales: A Study of Fashion and Markdown Pricing. The American Economic Review, 78(5), 936–953. Retrieved from http://www.jstor.org/stable/1807158

Basic idea: there are more and better priced clearance sales for items that quickly go out of fashion, fewer clearance sales for non-fashionable items (e.g., white shirts, blue blazers, grey pants.)

That is from Hal Varian, on the topic of “sexist pricing.”