Quantity surcharges occur when retailers carry a product in two sizes and offer a promotion on the small size: the large size then costs more per unit than the small one. When quantity surcharges occur, sales of the large size decline only slightly even though the same quantity can be purchased...

There is no widely accepted definition of price discrimination with differentiated products. Either absolute price-cost differences or percentage price-cost markups are used as benchmarks for comparison. I show that the two criteria are qualitatively different: one may indicate price...

Publishers produce books in hardcover and paperback versions with different prices and time of market introduction. Analysis of detailed book-level data reveals that (i) price-cost differentials cannot be explained by cost differences, making this an example of quality discrimination; (ii)...

There is no widely accepted definition of price discrimination with differentiated products. Either absolute price-cost differences or percentage price-cost markups are used as benchmarks for comparison. I show that the two criteria are qualitatively different: one may indicate price...

We show that books for general audiences are similarly priced internationally but textbooks are substantially more expensive in the United States. We argue that cost factors cannot explain this phenomenon and discuss several demand-side explanations