- Erotic content was a factor in the initial popularity of both media.
- The rental model was a new economic model that allowed both books and videos to be available to a wider audience because it was more affordable than owning.
- Both industries experienced backlash from producers (booksellers and movie studios) that thought the rental market would hurt the overall market, but it turns out to have helped provide more demand in both cases.
Circulating Libraries and Video Rental Stores by Richard Roehl and Hal R. Varian
First Monday, volume 6, number 5 (May 2001),