This study is the first of its kind to analyze and compare demand-driven acquisition (DDA) ebook programs on a large scale by using eight academic libraries. The purpose is to understand which factors contribute to successful collection management practices and sustainability. Study findings also offer insight into weeding practices and suggest that ebooks removed from the discovery pool too soon may impact service to library users. Furthermore, findings based on formula analysis show that return on investment (ROI) for serviceable content is better achieved through a sustained straight DDA model without short-term loans.

The "banana books" incident

Patron-driven acquisition has been an important, if contentious, topic for decades, with numerous programs having been piloted, adopted, and reported on, largely favorably, in the library literature. Still, questions and doubts persist for academic libraries, especially where the composition of vendor plans and packages and the judgment of patrons are concerned. Past literature has approached the assessment of patron-driven acquisition by analyzing circulation/usage, comparing peer-library holdings, seeking patrons’ or librarians’ judgments of utility and suitability, looking for evidence of collection imbalances, and testing for overlap in patrons’ and librarians’ purchases. To contribute to this literature, this study addresses scholarly impact and examines whose selections—approval plans’, librarians’, or patrons’—have been most heavily cited. For the social sciences, the sciences, and the humanities, the authors gathered topic-matched random samples of books acquired via approval plans and librarian orders during the first five years of operation of their institutions’ interlibrary loan purchase-on-demand patron-driven acquisition program and compared their citation counts to the counts of books acquired via the program.  Google Scholar  was employed to tally citations.

Academic libraries face a wide array of streaming video content, platform, hosting, and licensing options. Which is best for your library?

At the request of Sno-Isle Libraries, WA, OverDrive has developed a demand-driven acquisition (DDA) model for popular ebooks, enabling patrons to discover thousands of titles for which the library has not yet purchased a license. When a user checks out one of these titles, Sno-Isle is invoiced, and the ebook is added to the library’s collection in a transaction that appears seamless to the patron.

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Demand-driven acquisitions (DDA) programs have become a well-established approach toward integrating user involvement in the process of building academic library collections. However, these programs are in a constant state of evolution. A recent iteration in this evolution of ebook availability is the advent of large ebook collections whose contents libraries can lease, but not own only if they choose to do so. This study includes an investigation of patron usage and librarian ebook selection by comparing call number data generated by usage of three entities: (1) an ebrary PDA; (2) Academic Complete, which is a leased collection of ebooks; and (3) subject librarian selections based on the YPB approval plan at Iowa State University. The context is provided through a description of the development and evolution of demand driven acquisitions programs with an analysis of where libraries have been and where they are going with enhancing the collection development in academic libraries.

Library acquisitions lore contains a cautionary tale of a patron in a demand-driven environment who spent a huge chunk of the library budget on ebooks about bananas. This story and others like it have been used to perpetuate the argument that demand-driven acquisition will result in collections that don't appeal to a broad audience or are otherwise unbalanced. We apply post-acquisition usage data from multiple libraries to test the hypothesis that patron-acquired versus librarian-acquired collections have different usage profiles. In addition, we analyze their subject profiles to evaluate collection breadth and balance. Our results will help libraries to anticipate the effect of adding a demand-driven component to their ebook acquisition strategy.

How could the rise of patron-driven acquisition at academic libraries affect the university presses that rely on librarians to buy unpopular monographs?