Q. What is the Demand Driven Acquisitions (DDA) option in WorldCat Discovery?

The Demand Driven Acquisitions (DDA) options in the library catalog (Worldcat Discovery) are eBooks that users can access but that Butler Libraries hasn't paid for yet. This option allows Butler Libraries to make more titles accessible to our patrons while only paying for titles that are being used. 

Whenever a patron creates a loan for one of these items, the library is charged a percentage of the item's list price as a loan fee.  After there have been a certain number of loans on a title, the library will purchase the item outright. Usually, these purchases happen automatically. However, some titles may require a purchase request to be approved by the library. These mediated purchase requests are reviewed M-F during business hours.

Patrons can continue to check out and use the DDA titles just like they would any other eBook.  We don't recommend faculty use these titles in their course reserves, because Butler Libraries doesn't own these titles.  If a faculty member finds a title in DDA that they would like to use in a course, we ask that they contact their Library Liaison and request that the title be purchased.