We examine the problem of how a content provider, specifically the National Academies Press (NAP), can optimally price the different forms of its product—print and PDF—that it sells online. Whereas products in the traditional product line generally tend to be substitutes, the different...

Recently, marketing of content (such as books, video and music), digital products and services (such as mobile games, and software), or cloud-based services has been increasingly stimulated by the provision of free samples of content or free games or limited-version of the software or service....