[Eril-l] [EXT]: Triggers for DDA collections

Wentz, Erin erin.wentz at mcphs.edu
Thu Dec 5 06:03:12 PST 2019

Hi Cindy,

ProQuest has a DDA option<https://www.proquest.com/products-services/related/Flexible-Access-Models.html#dda> that I believe still lets you choose your own trigger point based on the number of uses. (It has been a couple of years since we participated in a DDA program with them.) Once you hit the trigger point, you automatically purchase the book. They also have several other acquisitions models<https://www.proquest.com/products-services/related/Flexible-Access-Models.html> if you decide they are a better fit.

JSTOR has an eBook DDA<https://about.jstor.org/books-jstor-demand-driven-acquisition/> that is based on the number of chapters viewed (6) or downloaded (4).

If you are interested in health topics, Rittenhouse's R2 Library's PDA program<https://www.r2library.com/Home/Faqs> allows three uses of a book before the library has to decide to either purchase the book or simply lose access to it.

There are likely other DDA options I do not know about.

Good luck!


From: Eril-l <eril-l-bounces at lists.eril-l.org> On Behalf Of Harper, Cynthia
Sent: Wednesday, December 4, 2019 8:11 PM
To: eril-l (eril-l at lists.eril-l.org) <eril-l at lists.eril-l.org>
Subject: [EXT]: [Eril-l] Triggers for DDA collections

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Hello - I'd like to hear if there are any ebook DDA collections for which the triggers are a little more lenient than EBSCO's.  We use EBSCO DDA, and have had to turn it off now that we started using EBSCO EDS - because these ebooks turn up at the top of the search, because they are ranked by date, and the DDA books are the newest.  And it does appear that people are spending the 10 minutes evaluating these books that cause them to be triggered.

One solution would be for us to remove all books from the most current 3 years or so from the DDA selectables.  But I'm wondering if there are any DDA experiences that don't purchase the book quite so readily.


Cindy Harper
E-services and periodicals librarian
Virginia Theological Seminary
Bishop Payne Library, VTS Box 159
3737 Seminary Road
Alexandria VA 22304
charper at vts.edu<mailto:charper at vts.edu>

Erin Wentz
Electronic Resources Librarian, Assistant Professor
Library and Learning Resources
MCPHS University
179 Longwood Avenue | Boston MA 02115
erin.wentz at mcphs.edu
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