Hat tip to Legal Research Plus for calling attention to this interesting NBER working paper:
Searching for Physical and Digital Media: The Evolution of Platforms for Finding Books by Michael R. Baye, Babur De los Santos, Matthijs R. Wildenbeest
NBER Working Paper No. 19519; Issued in October 2013
Abstract: This paper provides a data-driven overview of the different online platforms that consumers use to search for books and booksellers, and documents how the use of these platforms is shifting over time. Our data suggest that, as a result of digitization, consumers are increasingly conducting searches for books at retailer sites and closed systems (e.g., the Kindle and Nook) rather than at general search engines (e.g., Google or Bing). We also highlight a number of challenges that will make it difficult for researchers to accurately measure internet-based search behavior in the years to come. Finally, we highlight a number of open agenda items related to the pricing of books and other digital media, as well as consumer search behavior.