In an article published in 2003, these authors showed that, while most of the discussion about the value of the Internet to consumers has revolved around lower prices, consumer benefit (a.k.a. consumer surplus) from access to increased product variety in online book stores is ten times larger than their benefit from access to lower prices online.
U članku objavljenom 2003. autori su pokazali da – iako se većina rasprava o vrijednosti Interneta za potrošače fokusirala na niže cijene – korist za potrošače od pristupa raznolikijim proizvodima u internetskim knjižarama deset puta nadmašuje korist od nižih cijena na Internetu.