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E-Book Usage on a Global Scale:
Patterns, Trends, and
Opportunities
UKSG
Glasgow
March 30-31, 2015
Michael Levine-Clark
Un...
What (we think) we know
• E-books are better/worse
– For some subjects than others
– For some types of use than others
• E...
Tons of Data
The Project
• Worldwide usage data
– EBL 2013-2014
– ebrary 2013-2014
– All customers
– Aggregated by title
•...
The Shape of the Data
• Spreadsheets for the world and by region
• One title, with all associated data
– LC Class, Subclas...
Some Data Snags
• EBL and ebrary data are not yet merged
• Call numbers
– Missing
– Errors
• xQ102… (Q102)
• BBF1427… (BF)...
Benchmarking
• What can we learn from worldwide usage
data?
• Do trends across a huge data set matter?
• Is every institut...
Usage Definitions
• Session
– Any time that a user
interacts with an e-book
• Page View
– A count of the number
of pages e...
Titles Available
0
100000
200000
300000
400000
500000
600000
700000
Titles Available Worldwide By LC Class
0
20000
40000
60000
80000
100000
120000
Titles Available Worldwide By LC Class
0
10000
20000
30000
40000
50000
60000
70000
80000
Academic Complete
• Subscription package
• About 125,000 titles
• Same package at about 2,000 libraries
worldwide
• BIG IM...
Titles Available Worldwide By LC Class:
Comparison with Academic Complete
194420
185558
184053
Overall
STEM
Arts &
Humanit...
Titles Available Worldwide By LC Class:
Comparison with Academic Complete
185558 184053
194420
47572 40482
32133
0
50000
1...
Titles Available Worldwide By LC Class:
Comparison with Academic Complete
28.86% 28.63%
30.24%
38.04%
32.37%
25.69%
0.00%
...
Titles Available Worldwide By LC Class:
Comparison with Academic Complete
0
20000
40000
60000
80000
100000
120000
Overall ...
Titles Available Worldwide By LC Class:
Comparison with Academic Complete
0.00%
5.00%
10.00%
15.00%
20.00%
25.00%
Overall ...
Academic Complete
• More heavily weighted toward Arts &
Humanities and less weighted toward STEM
than overall data set
ONE TITLE, WORLDWIDE DATA
Booth, Craft of Research
0
500
1000
1500
2000
2500
3000
Libraries with availability
Libraries with Usage
Booth, Craft of Research
97%
17,089 Sessions
Academic
Public
Special
86%
Sessions by Region
Africa
Asia Pacific
AUS/NZ
Eur...
Booth, Craft of Research
• Additional Measures of Usage
– 368,879 page views
– 1,162 pages copied
– 62,009 pages printed
–...
How do you make sense of that?
Categories of Analysis
• LC Class and subclass
– Broad academic division (humanities, social
sciences, STEM)
– Subject
• B...
Academic Divisions
Arts & Humanities
B (Philosophy, Religion)
excluding BF (Psychology)
C, D, E, F (History)
M (Music)
N (...
Titles Available by Academic Division
194,420
185,558
184,053
78,854
STEM A&H Soc Sci Other
(12%)
(30%)
(29%)
(29%)
110,29...
Average Number of Libraries with Title Available
0
50
100
150
200
250
300
350
400
450
Average Number of Libraries with Title
Available – Academic Divisions
0
100
200
300
400
500
600
Arts & Humanities Social S...
Average Number of Libraries with Title
Available – Academic Divisions
0
20
40
60
80
100
120
Arts & Humanities Social Scien...
Average Number of Libraries
with Title Available - LC Class
0
100
200
300
400
500
600
700
800
900
412.26
Average Number of Libraries
with Title Available - LC Class
0
20
40
60
80
100
120
88.89
LIKELIHOOD THAT A LIBRARY WILL
SEE USAGE OF A TITLE
Average Number of Libraries With:
0.00
1.00
2.00
3.00
4.00
5.00
6.00
A & H Soc Sci STEM Average
Session
View
Download
Copy...
Percentage of Libraries With:
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
A & H Soc Sci STEM Average
Session
View
Download
Copy
P...
Percentage of Libraries Using a Title
Region Average # of
Libraries with Title
Average # of
Libraries with Use
of Title
% ...
Percentage of Libraries Using a Title,
By Discipline
Region Arts & Humanities Social Sciences STEM
Africa 0.33% 1.08% 0.85...
Conclusions about Likelihood of Use by
a Library
• For EBL, a higher percentage of libraries use
titles in the arts & huma...
LIKELIHOOD THAT A BOOK WILL BE
USED: ARE THESE THE RIGHT
BOOKS?
Titles Available / Titles Used
53.08%
46.88% 46.71%
38.59% 36.20% 33.13% 32.62% 32.16% 30.81%
25.41%
0%
10%
20%
30%
40%
50...
Percentage of Titles Used By Discipline
63.84%
59.47%
50.20%
53.08%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Social Sci...
Percentage of Titles Used By Discipline
73.99%
67.36% 67.36% 68.75%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Social Sci...
Percentage of Titles Used By LC Class
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Session No Session
Titles Used By LC Class
0
20000
40000
60000
80000
100000
120000
Session No Session
Percentage of Titles Used, By Division
Region Arts & Humanities Social Sciences STEM
Africa 14.95% 30.77% 33.96%
Asia Paci...
Availability vs Use
12%
30%
29%
29%
Availability
Other STEM
Social Sciences Arts & Humanities
5%
29%
34%
32%
Titles with a...
Availability vs Use
12%
30%
29%
29%
Availability
Other STEM
Social Sciences Arts & Humanities
4%
26%
40%
30%
Sessions
Availability vs Use
12%
30%
29%
29%
Availability
Other STEM
Social Sciences Arts & Humanities
4%
28%
39%
29%
Page Views
Availability vs Use
12%
30%
29%
29%
Availability
Other STEM
Social Sciences Arts & Humanities
4%
33%
35%
28%
Titles with a...
Availability vs Use
12%
30%
29%
29%
Availability
Other STEM
Social Sciences Arts & Humanities
4%
28%
39%
29%
Downloads
Availability vs Use
12%
30%
29%
29%
Availability
Other STEM
Social Sciences Arts & Humanities
4%
25%
38%
33%
Titles with C...
Availability vs Use
12%
30%
29%
29%
Availability
Other STEM
Social Sciences Arts & Humanities
4%
20%
45%
31%
Copy/Paste
Availability vs Use
12%
30%
29%
29%
Availability
Other STEM
Social Sciences Arts & Humanities
4%
26%
36%
34%
Titles with P...
Availability vs Use
12%
30%
29%
29%
Availability
Other STEM
Social Sciences Arts & Humanities
4%
32%
36%
28%
Printing
Availability vs Use
12%
30%
29%
29%
Availability
Other STEM
Social Sciences Arts & Humanities
4%
24%
40%
32%
Time Spent
Conclusions about Likelihood of Use
• Social Science titles are more likely to have at
least one use
– But, some humanitie...
LIKELIHOOD OF HIGH USE
Page Views Per Session
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
16.00
18.00
Page Views Per Session: By Academic
Division and Region
0
2
4
6
8
10
12
14
16
18
20
A&H Soc Sci STEM
Page Views Per Session By LC Class
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
16.00
18.00
20.00
Downloads Per Session
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Downloads Per Session: By Academic
Division and Region
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
A&H Soc Sci STEM
Downloads Per Session by LC Class
0
0.05
0.1
0.15
0.2
0.25
0.3
Copies Per Session
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
0.2
Copies Per Session: By Academic Division
and Region
0
0.05
0.1
0.15
0.2
0.25
A&H Soc Sci STEM
Copies Per Session by LC Class
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
Prints Per Session
0
1
2
3
4
5
6
Prints Per Session: By Academic Division
and Region
0
1
2
3
4
5
6
7
8
9
A&H Soc Sci STEM
Prints Per Session by LC Class
0
0.5
1
1.5
2
2.5
3
Time Per Session
0
200
400
600
800
1000
1200
1400
1600
Time Per Session: By Academic Division
and Region
0
200
400
600
800
1000
1200
1400
1600
1800
A&H Soc Sci STEM
Time Per Session by LC Class
0
200
400
600
800
1000
1200
1400
Likelihood of High Use: Conclusions
• Views Per Session
– Lowest in Developing
world
– Generally highest for
STEM
• Copy/P...
Time Per Session
• Shorter in developing world
• Longest in Arts & Humanities
• Shortest in STEM
THE MOST HEAVILY-USED TITLES
Top 10% of Titles with Sessions
• Worldwide
– 64,314 titles (10.00%)
• 75 sessions or more
– 15,755,652 sessions (80.69% o...
% of Sessions Represented by Top 10% of Titles
0.00%
10.00%
20.00%
30.00%
40.00%
50.00%
60.00%
70.00%
80.00%
90.00%
100.00%
Disciplinary Representation Within Top
10% of Titles Used
Other
4%
STEM
26%
Soc Sci
37%
A&H
33%
Titles
Other
4%
STEM
27%
S...
Titles Available by Academic Division
12%
30%
29%
29%
Other
STEM (Q, R, S, T-TP, TS-
TX)
Social Sciences (BF, H, J,
K, L, ...
Disciplinary Spread within Top 10% of Titles Used
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
A & H
Soc Sci
STEM
Other
% of Sessions within Top 10% of Titles
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Other STEM Soc Sci A & H
% of Sessions Represented by Top 10% of Titles
77.21%
83.05%
80.96%
74.00%
75.00%
76.00%
77.00%
78.00%
79.00%
80.00%
81.00...
% of Sessions Represented by Top 10% of Titles
50.00%
55.00%
60.00%
65.00%
70.00%
75.00%
80.00%
85.00%
90.00%
95.00%
100.0...
High-Use Titles: Conclusions
• Top 10% of titles represent 70% of sessions
worldwide
• Social Sciences more heavily repres...
INTENSIVE / EXTENSIVE USE
Breadth vs Depth
PERCENTAGE OF TITLES USED
AVERAGEAMOUNTOFUSE
SESSIONS
Percentage of Titles in LC Class With Session
AverageSessionsPerTitle
VIEWS
Percentage of Titles in LC Class With View
AverageViewsPerTitle
DOWNLOADS
Percentage of Titles in LC Class With Download
AverageDownloadsPerTitle
COPIES
Percentage of Titles in LC Class With Copy
AverageCopiesPerTitle
PRINTS
Percentage of Titles in LC Class With Print
AveragePrintsPerTitle
COMBINED
Sessions
Views
Downloads
Copies
Prints
SESSIONS
Percentage of Titles in LC Class With Session
AverageSessionsPerTitle
VIEWS
Percentage of Titles in LC Class With View
AverageViewsPerTitle
DOWNLOADS
Percentage of Titles in LC Class With Download
AverageDownloadsPerTitle
COPIES
Percentage of Titles in LC Class With a Copy
AverageCopiesPerTitle
PRINTING
Percentage of Titles in LC Class With a Print
AveragePrintsPerTitle
COMBINED
Sessions
Views
Downloads
Copies
Prints
USAGE BY YEAR OF PUBLICATION
Titles Available
0
10000
20000
30000
40000
50000
60000
70000
80000
1651
1764
1772
1778
1787
1792
1799
1804
1809
1815
1820
...
Titles Available
0
5000
10000
15000
20000
25000
1651
1764
1772
1778
1787
1792
1799
1804
1809
1815
1820
1825
1830
1835
1840...
Titles Available by Publication Year,
2000-2015
0
10000
20000
30000
40000
50000
60000
70000
80000
2000 2001 2002 2003 2004...
Titles Available by Publication Year,
2000-2015
0
5000
10000
15000
20000
25000
2000 2001 2002 2003 2004 2005 2006 2007 200...
Titles with a Session by Publication Year,
2000-2015
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
2000 2001 2002...
Titles with a Session by Publication Year,
2000-2015
0
2000
4000
6000
8000
10000
12000
14000
16000
2000 2001 2002 2003 200...
Sessions by Publication Year, 2000-2015
0
500000
1000000
1500000
2000000
2500000
2000 2001 2002 2003 2004 2005 2006 2007 2...
Sessions by Publication Year, 2000-2015
0
100000
200000
300000
400000
500000
600000
700000
800000
900000
2000 2001 2002 20...
Titles with Session vs Availability, by
Date, 2000-2015
CONCLUSIONS
One Size Does Not Fit All
• Arts & Humanities
– Highest likelihood a library with access to a title will make
use of it
• ...
Don’t Rely on a Single Measure of Use
• Comparing multiple factors tells a more
complete story
– Actions per session
– Use...
Think Broadly
• All subjects get used
• Publication date does not appear to be a
major factor
Questions?
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Levine-Clark, Michael and Kari Paulson, “E-Book Usage on a Global Scale: Patterns, Trends, and Opportunities,” UKSG Annual Conference, Glasgow, March 30-April 1, 2015.

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Levine-Clark, Michael and Kari Paulson, “E-Book Usage on a Global Scale: Patterns, Trends, and Opportunities,” UKSG Annual Conference, Glasgow, March 30-April 1, 2015.

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Levine-Clark, Michael and Kari Paulson, “E-Book Usage on a Global Scale: Patterns, Trends, and Opportunities,” UKSG Annual Conference, Glasgow, March 30-April 1, 2015.

  1. 1. E-Book Usage on a Global Scale: Patterns, Trends, and Opportunities UKSG Glasgow March 30-31, 2015 Michael Levine-Clark University of Denver michael.levine-clark@du.edu
  2. 2. What (we think) we know • E-books are better/worse – For some subjects than others – For some types of use than others • E-books don’t work for immersive reading • E-books don’t work for the humanities
  3. 3. Tons of Data The Project • Worldwide usage data – EBL 2013-2014 – ebrary 2013-2014 – All customers – Aggregated by title • Today: – EBL 2013 – ebrary 2014
  4. 4. The Shape of the Data • Spreadsheets for the world and by region • One title, with all associated data – LC Class, Subclass, BISAC – Publication Year – Number of libraries with title available – Number of libraries with usage – Multiple measures of usage
  5. 5. Some Data Snags • EBL and ebrary data are not yet merged • Call numbers – Missing – Errors • xQ102… (Q102) • BBF1427… (BF) • Not easy to retroactively build a list of titles visible to a library at a particular time
  6. 6. Benchmarking • What can we learn from worldwide usage data? • Do trends across a huge data set matter? • Is every institution so unique that only local data is meaningful? – Every institution has other resources competing for each user’s time. – e-books take up varying portions of an overall collection
  7. 7. Usage Definitions • Session – Any time that a user interacts with an e-book • Page View – A count of the number of pages examined • Download – A download of the entire book (EBL and ebrary) • Chapter Download (ebrary) • Usage Time – Minutes (EBL) or seconds (ebrary) spent looking at the book • Copies – A count of pages copied/pasted • Prints – A count of the number of pages printed
  8. 8. Titles Available 0 100000 200000 300000 400000 500000 600000 700000
  9. 9. Titles Available Worldwide By LC Class 0 20000 40000 60000 80000 100000 120000
  10. 10. Titles Available Worldwide By LC Class 0 10000 20000 30000 40000 50000 60000 70000 80000
  11. 11. Academic Complete • Subscription package • About 125,000 titles • Same package at about 2,000 libraries worldwide • BIG IMPACT on ebrary data
  12. 12. Titles Available Worldwide By LC Class: Comparison with Academic Complete 194420 185558 184053 Overall STEM Arts & Humanities Social Sciences (28.86%) (30.24%)(28.63%) 32133 47572 40482 Academic Complete STEM Arts & Humanities Social Sciences (38.04%) (25.69%)(32.37%)
  13. 13. Titles Available Worldwide By LC Class: Comparison with Academic Complete 185558 184053 194420 47572 40482 32133 0 50000 100000 150000 200000 250000 Arts & Humanities Social Sciences STEM Overall Academic Complete
  14. 14. Titles Available Worldwide By LC Class: Comparison with Academic Complete 28.86% 28.63% 30.24% 38.04% 32.37% 25.69% 0.00% 5.00% 10.00% 15.00% 20.00% 25.00% 30.00% 35.00% 40.00% Arts & Humanities Social Sciences STEM Overall Academic Complete
  15. 15. Titles Available Worldwide By LC Class: Comparison with Academic Complete 0 20000 40000 60000 80000 100000 120000 Overall Academic Complete
  16. 16. Titles Available Worldwide By LC Class: Comparison with Academic Complete 0.00% 5.00% 10.00% 15.00% 20.00% 25.00% Overall Academic Complete
  17. 17. Academic Complete • More heavily weighted toward Arts & Humanities and less weighted toward STEM than overall data set
  18. 18. ONE TITLE, WORLDWIDE DATA
  19. 19. Booth, Craft of Research 0 500 1000 1500 2000 2500 3000 Libraries with availability Libraries with Usage
  20. 20. Booth, Craft of Research 97% 17,089 Sessions Academic Public Special 86% Sessions by Region Africa Asia Pacific AUS/NZ Europe Latin America Middle East North America South Asia UK/Ireland
  21. 21. Booth, Craft of Research • Additional Measures of Usage – 368,879 page views – 1,162 pages copied – 62,009 pages printed – 0 downloads – 2,323 chapter downloads – Used 17,453,759 seconds (4,848 hours)
  22. 22. How do you make sense of that?
  23. 23. Categories of Analysis • LC Class and subclass – Broad academic division (humanities, social sciences, STEM) – Subject • BISAC • Publication date • Region (Africa, Asia Pacific, etc.) • Publisher or publisher type
  24. 24. Academic Divisions Arts & Humanities B (Philosophy, Religion) excluding BF (Psychology) C, D, E, F (History) M (Music) N (Fine Arts) P (Language & Literature) TR (Photography) Other A (General) G (Geography, Anthropology, Recreation) Z (Bibliography, LIS) Social Sciences BF (Psychology) H (Social Sciences) J (Political Science) K (Law) L (Education) U, V (Military, Naval Sciences) STEM Q (Science) R (Medicine) S (Agriculture) T (Technology) (excluding TR)
  25. 25. Titles Available by Academic Division 194,420 185,558 184,053 78,854 STEM A&H Soc Sci Other (12%) (30%) (29%) (29%) 110,292 102,409 118,732 53,561 (14%) (29%) (27%) (31%)
  26. 26. Average Number of Libraries with Title Available 0 50 100 150 200 250 300 350 400 450
  27. 27. Average Number of Libraries with Title Available – Academic Divisions 0 100 200 300 400 500 600 Arts & Humanities Social Sciences STEM Other 412.26
  28. 28. Average Number of Libraries with Title Available – Academic Divisions 0 20 40 60 80 100 120 Arts & Humanities Social Sciences STEM Other 88.89
  29. 29. Average Number of Libraries with Title Available - LC Class 0 100 200 300 400 500 600 700 800 900 412.26
  30. 30. Average Number of Libraries with Title Available - LC Class 0 20 40 60 80 100 120 88.89
  31. 31. LIKELIHOOD THAT A LIBRARY WILL SEE USAGE OF A TITLE
  32. 32. Average Number of Libraries With: 0.00 1.00 2.00 3.00 4.00 5.00 6.00 A & H Soc Sci STEM Average Session View Download Copy Print Libraries with title available 76.78 100.63 87.56
  33. 33. Percentage of Libraries With: 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 A & H Soc Sci STEM Average Session View Download Copy Print
  34. 34. Percentage of Libraries Using a Title Region Average # of Libraries with Title Average # of Libraries with Use of Title % of Libraries Using Title UK/Ireland 18.97 2.15 11.33% Australia/NZ 16.86 1.39 8.22% North America 204.70 5.26 2.57% Europe 60.36 1.48 2.46% Asia Pacific 169.97 1.78 1.05% South Asia 58.06 0.56 0.96% Middle East 87.51 0.71 0.81% Africa 69.14 0.51 0.77% Latin America 119.40 0.93 0.68% World 412.26 9.25 2.24%
  35. 35. Percentage of Libraries Using a Title, By Discipline Region Arts & Humanities Social Sciences STEM Africa 0.33% 1.08% 0.85% Asia Pacific 0.71% 1.24% 1.31% Australia/NZ 6.23% 9.42% 9.34% Europe 2.07% 2.81% 2.47% Latin America 0.42% 0.80% 1.19% Middle East 0.54% 0.88% 1.12% North America 2.42% 2.72% 2.58% South Asia 0.60% 1.04% 1.32% UK/Ireland 9.84% 13.22% 11.01% World 1.93% 2.48% 2.36%
  36. 36. Conclusions about Likelihood of Use by a Library • For EBL, a higher percentage of libraries use titles in the arts & humanities • For ebrary, a higher percentage of libraries use titles in STEM and Social Sciences with variation by region
  37. 37. LIKELIHOOD THAT A BOOK WILL BE USED: ARE THESE THE RIGHT BOOKS?
  38. 38. Titles Available / Titles Used 53.08% 46.88% 46.71% 38.59% 36.20% 33.13% 32.62% 32.16% 30.81% 25.41% 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Titles With a Session Titles without a Session
  39. 39. Percentage of Titles Used By Discipline 63.84% 59.47% 50.20% 53.08% 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Social Sciences Arts & Humanities STEM All Subjects Useed Unused
  40. 40. Percentage of Titles Used By Discipline 73.99% 67.36% 67.36% 68.75% 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Social Sciences Arts & Humanities STEM All Subjects Useed Unused
  41. 41. Percentage of Titles Used By LC Class 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Session No Session
  42. 42. Titles Used By LC Class 0 20000 40000 60000 80000 100000 120000 Session No Session
  43. 43. Percentage of Titles Used, By Division Region Arts & Humanities Social Sciences STEM Africa 14.95% 30.77% 33.96% Asia Pacific 45.80% 48.95% 46.48% Australia/NZ 35.61% 40.24% 40.69% Europe 36.79% 37.97% 25.36% Latin America 26.83% 35.65% 34.11% Middle East 25.65% 29.62% 41.59% North America 54.16% 54.67% 43.94% South Asia 24.01% 32.28% 43.88% UK/Ireland 38.17% 38.45% 31.66% World 59.47% 63.84% 50.20%
  44. 44. Availability vs Use 12% 30% 29% 29% Availability Other STEM Social Sciences Arts & Humanities 5% 29% 34% 32% Titles with a Session
  45. 45. Availability vs Use 12% 30% 29% 29% Availability Other STEM Social Sciences Arts & Humanities 4% 26% 40% 30% Sessions
  46. 46. Availability vs Use 12% 30% 29% 29% Availability Other STEM Social Sciences Arts & Humanities 4% 28% 39% 29% Page Views
  47. 47. Availability vs Use 12% 30% 29% 29% Availability Other STEM Social Sciences Arts & Humanities 4% 33% 35% 28% Titles with a Download
  48. 48. Availability vs Use 12% 30% 29% 29% Availability Other STEM Social Sciences Arts & Humanities 4% 28% 39% 29% Downloads
  49. 49. Availability vs Use 12% 30% 29% 29% Availability Other STEM Social Sciences Arts & Humanities 4% 25% 38% 33% Titles with Copy/Paste
  50. 50. Availability vs Use 12% 30% 29% 29% Availability Other STEM Social Sciences Arts & Humanities 4% 20% 45% 31% Copy/Paste
  51. 51. Availability vs Use 12% 30% 29% 29% Availability Other STEM Social Sciences Arts & Humanities 4% 26% 36% 34% Titles with Printing
  52. 52. Availability vs Use 12% 30% 29% 29% Availability Other STEM Social Sciences Arts & Humanities 4% 32% 36% 28% Printing
  53. 53. Availability vs Use 12% 30% 29% 29% Availability Other STEM Social Sciences Arts & Humanities 4% 24% 40% 32% Time Spent
  54. 54. Conclusions about Likelihood of Use • Social Science titles are more likely to have at least one use – But, some humanities subjects are most heavily used. P (languages and literature) is relatively poorly used. • In general, social sciences titles are used above what one would predict, with sciences lower.
  55. 55. LIKELIHOOD OF HIGH USE
  56. 56. Page Views Per Session 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00
  57. 57. Page Views Per Session: By Academic Division and Region 0 2 4 6 8 10 12 14 16 18 20 A&H Soc Sci STEM
  58. 58. Page Views Per Session By LC Class 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00
  59. 59. Downloads Per Session 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
  60. 60. Downloads Per Session: By Academic Division and Region 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 A&H Soc Sci STEM
  61. 61. Downloads Per Session by LC Class 0 0.05 0.1 0.15 0.2 0.25 0.3
  62. 62. Copies Per Session 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2
  63. 63. Copies Per Session: By Academic Division and Region 0 0.05 0.1 0.15 0.2 0.25 A&H Soc Sci STEM
  64. 64. Copies Per Session by LC Class 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18
  65. 65. Prints Per Session 0 1 2 3 4 5 6
  66. 66. Prints Per Session: By Academic Division and Region 0 1 2 3 4 5 6 7 8 9 A&H Soc Sci STEM
  67. 67. Prints Per Session by LC Class 0 0.5 1 1.5 2 2.5 3
  68. 68. Time Per Session 0 200 400 600 800 1000 1200 1400 1600
  69. 69. Time Per Session: By Academic Division and Region 0 200 400 600 800 1000 1200 1400 1600 1800 A&H Soc Sci STEM
  70. 70. Time Per Session by LC Class 0 200 400 600 800 1000 1200 1400
  71. 71. Likelihood of High Use: Conclusions • Views Per Session – Lowest in Developing world – Generally highest for STEM • Copy/Paste Per Session – Regional variations – Generally highest for Social Sciences, lowest for STEM • Downloads Per Session – Highest in Developing world – Generally highest for STEM • Printing Per Session – Regional variations – Generally highest for STEM
  72. 72. Time Per Session • Shorter in developing world • Longest in Arts & Humanities • Shortest in STEM
  73. 73. THE MOST HEAVILY-USED TITLES
  74. 74. Top 10% of Titles with Sessions • Worldwide – 64,314 titles (10.00%) • 75 sessions or more – 15,755,652 sessions (80.69% of all sessions) – Available at 1,821 libraries on average – Used at 68 libraries on average (3.75%)
  75. 75. % of Sessions Represented by Top 10% of Titles 0.00% 10.00% 20.00% 30.00% 40.00% 50.00% 60.00% 70.00% 80.00% 90.00% 100.00%
  76. 76. Disciplinary Representation Within Top 10% of Titles Used Other 4% STEM 26% Soc Sci 37% A&H 33% Titles Other 4% STEM 27% Soc Sci 42% A&H 27% Sessions
  77. 77. Titles Available by Academic Division 12% 30% 29% 29% Other STEM (Q, R, S, T-TP, TS- TX) Social Sciences (BF, H, J, K, L, U, V) Arts & Humanities (B-BD, BH-BX, C, D, E, F, M, N, P, TR)
  78. 78. Disciplinary Spread within Top 10% of Titles Used 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% A & H Soc Sci STEM Other
  79. 79. % of Sessions within Top 10% of Titles 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Other STEM Soc Sci A & H
  80. 80. % of Sessions Represented by Top 10% of Titles 77.21% 83.05% 80.96% 74.00% 75.00% 76.00% 77.00% 78.00% 79.00% 80.00% 81.00% 82.00% 83.00% 84.00% A & H Soc Sci STEM
  81. 81. % of Sessions Represented by Top 10% of Titles 50.00% 55.00% 60.00% 65.00% 70.00% 75.00% 80.00% 85.00% 90.00% 95.00% 100.00% A & H Soc Sci STEM
  82. 82. High-Use Titles: Conclusions • Top 10% of titles represent 70% of sessions worldwide • Social Sciences more heavily represented than in the data set as a whole • Arts & Humanities more heavily represented, but accounts for fewer sessions than would be expected – Usage spread more deeply across titles for A&H
  83. 83. INTENSIVE / EXTENSIVE USE
  84. 84. Breadth vs Depth PERCENTAGE OF TITLES USED AVERAGEAMOUNTOFUSE
  85. 85. SESSIONS Percentage of Titles in LC Class With Session AverageSessionsPerTitle
  86. 86. VIEWS Percentage of Titles in LC Class With View AverageViewsPerTitle
  87. 87. DOWNLOADS Percentage of Titles in LC Class With Download AverageDownloadsPerTitle
  88. 88. COPIES Percentage of Titles in LC Class With Copy AverageCopiesPerTitle
  89. 89. PRINTS Percentage of Titles in LC Class With Print AveragePrintsPerTitle
  90. 90. COMBINED Sessions Views Downloads Copies Prints
  91. 91. SESSIONS Percentage of Titles in LC Class With Session AverageSessionsPerTitle
  92. 92. VIEWS Percentage of Titles in LC Class With View AverageViewsPerTitle
  93. 93. DOWNLOADS Percentage of Titles in LC Class With Download AverageDownloadsPerTitle
  94. 94. COPIES Percentage of Titles in LC Class With a Copy AverageCopiesPerTitle
  95. 95. PRINTING Percentage of Titles in LC Class With a Print AveragePrintsPerTitle
  96. 96. COMBINED Sessions Views Downloads Copies Prints
  97. 97. USAGE BY YEAR OF PUBLICATION
  98. 98. Titles Available 0 10000 20000 30000 40000 50000 60000 70000 80000 1651 1764 1772 1778 1787 1792 1799 1804 1809 1815 1820 1825 1830 1835 1840 1845 1850 1855 1860 1865 1870 1875 1880 1885 1890 1895 1900 1905 1910 1915 1920 1925 1930 1935 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 All Arts & Humanities STEM Social Sciences
  99. 99. Titles Available 0 5000 10000 15000 20000 25000 1651 1764 1772 1778 1787 1792 1799 1804 1809 1815 1820 1825 1830 1835 1840 1845 1850 1855 1860 1865 1870 1875 1880 1885 1890 1895 1900 1905 1910 1915 1920 1925 1930 1935 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 Arts & Humanities STEM Social Sciences
  100. 100. Titles Available by Publication Year, 2000-2015 0 10000 20000 30000 40000 50000 60000 70000 80000 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 All Arts & Humanities STEM Social Sciences
  101. 101. Titles Available by Publication Year, 2000-2015 0 5000 10000 15000 20000 25000 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 Arts & Humanities STEM Social Sciences
  102. 102. Titles with a Session by Publication Year, 2000-2015 0 5000 10000 15000 20000 25000 30000 35000 40000 45000 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 World A & H Soc Sci STEM
  103. 103. Titles with a Session by Publication Year, 2000-2015 0 2000 4000 6000 8000 10000 12000 14000 16000 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 A & H Soc Sci STEM
  104. 104. Sessions by Publication Year, 2000-2015 0 500000 1000000 1500000 2000000 2500000 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 World A & H Soc Sci STEM
  105. 105. Sessions by Publication Year, 2000-2015 0 100000 200000 300000 400000 500000 600000 700000 800000 900000 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 A & H Soc Sci STEM
  106. 106. Titles with Session vs Availability, by Date, 2000-2015
  107. 107. CONCLUSIONS
  108. 108. One Size Does Not Fit All • Arts & Humanities – Highest likelihood a library with access to a title will make use of it • Social Sciences – Highest percentage of available titles used – Even higher percentage of overall sessions • STEM – Most page views per session – Most downloads per session – Least amount of time in the book
  109. 109. Don’t Rely on a Single Measure of Use • Comparing multiple factors tells a more complete story – Actions per session – Use relative to availability – Intensive vs extensive use
  110. 110. Think Broadly • All subjects get used • Publication date does not appear to be a major factor
  111. 111. Questions?

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