are ebooks used equally across the disciplines? teddy gray, duke university alex carroll, university...
TRANSCRIPT
Are Ebooks Used Equally Across the Disciplines?
Teddy Gray, Duke University
Alex Carroll, University of Maryland
TRLN Annual Meeting
July 22, 2013
Increasing Importance of Ebooks
Duke has acquired over 13,000 titles on the ebrary platform since 2008
Titles are spread across all LC classes Titles have been acquired through:
Approval plan Firm orders Demand Driven Acquisitions (DDA)
Assumptions to Test
Ebooks have greater use by science patrons than humanities patrons
Science patrons are more interested in downloading chapters
Humanities patrons are more interested in downloading full titles
Data Used
Number of user sessions per title Number of chapter downloads per title Number of full title downloads per title Cost per title All were mapped against LC class Tried to capture usage along with intensity of
usage
Title Breakdown
Titles Purchased by Year
2008 2009 2010 2011 20120
1000
2000
3000
4000
5000
6000
7000
Titles by LC Class
H P B Q D J T E G L M R F N0
500
1000
1500
2000
2500
3000
Usage Results
Titles with Use
R F N B Q M G E H D P T J L0%
10%
20%
30%
40%
50%
60%
70%
80%
Sessions per Title
Q R E F B H G N J D M L T P0
1
2
3
4
5
6
Page Views per Session
L R E H Q F T D G M B J N P0
5
10
15
20
25
Sessions per Chapter Download
Q T R J B D F H E G P N M L0
2
4
6
8
10
12
14
16
18
Sessions per Full Title Download
P B T Q N D G J M H R E L0
10
20
30
40
50
60
70
80
Usage and Cost Results
Cost per Title
F E M N P D G H J L B R Q T$0
$20
$40
$60
$80
$100
$120
$140
Cost per Session
R F E Q N B G H M D J P L T$0
$10
$20
$30
$40
$50
$60
$70
Cost per Download
R Q F B E H J D G T N P M L$0
$100
$200
$300
$400
$500
$600
$700
Results
Biggest divide between humanities and sciences: Sessions per title Sessions per chapter downloads Cost per download
Results
R and Q titles: consistent high usage E and F titles: good usage and low costs T titles: low usage but high downloads P titles: low usage but highest full title
downloads Perhaps platform influenced the results
Sessions per Downloadby Platform
ebrary EBL0
1
2
3
4
Thank You