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This study compares three different models for selecting e-books for a research library’s collection. From 2013 to 2018, the University of Oklahoma Libraries contracted with Elsevier for an evidence-based selection (EBS) agreement. The titles in that EBS package were compared to the approval plan parameters to determine which books would have been purchased on approval during those years if Elsevier had been included among the publishers profiled. Subject librarians also made hypothetical selections as though they were placing firm orders from this collection. The approval plan selections and librarians’ selections were compared to usage data to determine how closely each selection model matched patrons’ choices.
