Print & Electronic Journal Usage Patterns: a Library Case Study by ETH Zürich
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Print & Electronic Journal Usage Patterns:
a Library Case Study by ETH Zürich
Dr. Alice Keller, ETH-Bibliothek
Elsevier‘s 4th ScienceDirect Annual Conference, Amsterdam,14-15 March 2002
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Journals at the ETH Library
• Print only journals: 2‘800
• Print + online journals: 2‘000
• Online only journals: 1‘200
• Total: 6‘000
3‘200 e-journals
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Journal Usage at the ETH Library
Journals consulted in reading room no data available
Documents requested: 480‘000 items per annum how many are journals?
Requests for photocopies: 106‘000 per annum mainly journal articles
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Print Journal Usage: Selected Titles
• Planta Medica, Thieme » 140 requests in 2001
• Journal of Animal Ecology, Blackwell » 82 requests in 2001
• Biochemistry, ACS » 432 requests in 2001
• Chemistry of Materials, ACS » 146 requests in 2001
• Historia Mathematica, Academic Press » 17 requests in 2001
online
online
online
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Planta Medica, Thieme (1953-) Usage Pattern 2001
0
2
4
6
8
10
12
14
2001
1999
1997
1995
1993
1991
1989
1987
1985
1983
1981
1979
1977
1975
1973
1971
1969
1967
1965
1963
1961
1959
1957
1955
1953
Req
uest
s fo
r pr
int v
olum
es (
2001
)
140 requests in 2001
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Journal of Animal Ecology, Blackwell (1932-)
Usage Pattern 2001
0
1
2
3
4
5
6
7
8
9
2001
1998
1995
1992
1989
1986
1983
1980
1977
1974
1971
1968
1965
1962
1959
1956
1953
1950
1947
1944
1941
1938
1935
1932
Req
uest
s fo
r pr
int v
olum
es (
2001
)
82 requests in 2001
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Biochemistry, ACS (1962-) (online available from 1996)
Usage Pattern 2001
0
5
10
15
20
25
30
35
40
2001
1999
1997
1995
1993
1991
1989
1987
1985
1983
1981
1979
1977
1975
1973
1971
1969
1967
1965
1963
Req
uest
s fo
r pr
int v
olum
es (
2001
)
432 requests in 2001+ 3660 full text downloads in 2001
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Chemistry of Materials, ACS (1989-)(available online from 1996)
Usage Pattern
146 requests in 2001+ 1069 full text downloads in 2001
0
5
10
15
20
25
2001
2000
1999
1998
1997
1996
1995
1994
1993
1992
1991
1990
1989
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Historia Mathematica, Academic Press (1974-)
online available from 1996
Usage Pattern 2001
17 requests in 2001+ 3 full text downloads in 2001
0
1
2
3
2001
1999
1997
1995
1993
1991
1989
1987
1985
1983
1981
1979
1977
1975
Req
uest
s fo
r pr
int v
olum
es
(200
1)
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Print Usage Patterns: Conclusions
• Recent years are most heavily used• However, backyears are also
requested regularly• Usage stats show roughly 8 times as
many full text downloads as print requests (estimate)
• Online access reduces – but does not eliminate – requests for print volumes
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Electronic Journals at ETH Library
• 3‘200 e-journals (January 2002)• All STM titles• National consortia for
– Springer LINK– Academic Press– Elsevier ScienceDirect
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Usage of Electronic Journals
• Usage statistics available at ETH Library
• Comparison of usage of different journals
• Benefits of journal consortia• Comparison of journal usage in
different subject areas
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E-Journal Usage Statistics at ETH Library
E-Journals at ETH Zurich: Availability of usage stats according to publishers10%
9%
81%
Publisher supplied usagedata
Publisher could not supplydata
Publisher w as notapproached
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E-Journals at ETH Zurich:Availability of usage stats according to Journals63%
26%
11%
Publisher supplied usagedata
Publisher could not supplydata
Publisher w as notapproached
E-Journal Usage Statistics at ETH Library
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E-Journals Usage: Summary of All Titles (2001)
E-Journal Usage: All Titles
0
200
400
600
800
1000
1200
1400
0
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
and
ove
r
No. of full text dow nloads
No.
of j
ourn
als
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... Looking at Those with under 100‘s Downloads...
E-Journal Usage: All Titles
0
100
200
300
400
500
600
0 10 20 30 40 50 60 70 80 90 100
over
100
No. of full text dow nloads
No.
of j
ourn
als
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E-Journal Usage Patterns I: Conclusions
• 8,3% of the e-journals were never accessed during 2001
• A further 53% are not accessed more than 50 times
• 22 journals are accessed more than 3000 times ....
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... These 22 Journals are ...
• Science, Am.Assoc.Adv.Science• Nature, Macmillan • PNAS, Nat.Acad.Sciences • Journal of Biological Chemistry,
ASBMB• Journal of the ACS, ACS• Lecture Notes in Computer Science,
Springer• Journal of Organic Chemistry, ACS• Cell, Cell Press• Tetrahedron Letters, Elsevier• Organic Letters, ACS• Computers and Security, Elsevier
• Physical Review Letters, APS• Journal of Chemical Physics, AIP• Chemical Communications, RSC• Journal of Physical Chemistry A,
ACS• Physical Review B, APS• Journal of Cell Biology, Rockefeller
Univ. Press• Biochemistry, ACS• Nature Biotechnology, Nature
America• Applied Physics Letters, AIP• Tetrahedron, Elsevier• EMBO Journal, OUP
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Benefits of Journal Consortia
A consortium offers:
• New titles that were not available in print Increased Collection
• Access to articles that were not available in print Article Cross Access
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Increased Collection
A consortium enriches the library‘s collectionwith new titles that weren‘t subscribed to before.
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Article Cross Access
Users can download articles they didn‘t have access to before.
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Benefits of Consortia according to Subject Area (all data ETH)
Subject areas analysed:• Biology • Chemistry• Earth Sciences• Mathematics• Medicine• Physics• Mechanical Engineering
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Benefits of Consortia acc. to Subject Area: Increased Collection (2001)
All 3 Consortia (Springer, AP, SciDirect)
0
100
200
300
400
500
BIO
L
CH
EM
EA
RT
H
MA
TH
ME
D
PH
YS
ME
CH
No.
of j
ourn
al ti
tles
Journal in print collection Increased collection
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Benefits of Consortia acc. to Subject Area: Article Cross Access (2001)
All 3 Consortia (Springer, AP, SciDirect)
0
10'000
20'000
30'000
40'000
50'000
BIO
L
CH
EM
EA
RT
H
MA
TH
ME
D
PH
YS
ME
CHN
o. o
f ful
l tex
t dow
nloa
ds
Journal in print collection Article Cross Access
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Cross Access Rates Around the World
• ETH Library: 9-23% (*)
• Bayern Consortium: 24-31%
• OHIO Link Consortium: 30-85%(*) all depending on publisher
A high cross access rate indicates .... a successful consortium, .... or that the print collection was
inadequate.
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Subject areas analysed:• Biology: 380 FTEs• Chemistry: 340 FTEs• Earth Sciences: 215 FTEs• Mathematics: 200 FTEs• Physics: 385 FTEs• Mechanical Engin.: 367 FTEs
(All faculty members (FTE), doctoral + postdoc students (FTE), advanced undergraduate students)
Comparison of Journal Usage in Different Subject Areas
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Comparison of E-Journal Collection in Different Subject
AreasE-Journal Collection / Subject Area
0.00.20.40.60.81.01.21.4
BIO
L
CH
EM
EA
RT
H
MA
TH
PH
YS
ME
CH
No.
of j
ourn
als
per
FT
E
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Comparison of E-Journal Usage in Different Subject Areas
Full Text Dow nloads / Subject Area
0
50
100
150
200
250
300
BIO
L
CH
EM
EA
RT
H
MA
TH
PH
YS
ME
CH
No.
of f
ull t
ext d
ownl
oads
per
FT
E
All data from ETH Zurich, Jan-Dec 2001
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E-Journal Usage Patterns II: Conclusions
• Usage data is still very incomplete• Many journals are rarely used, few are
very heavily used• Consortial deals increase size of collection• Cross access rates vary according to
libraries and subject areas• Heaviest e-journal usage is found in
Biology, Chemistry and Physics• Weakest usage in Engineering
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A final word from the Neue Zürcher Zeitung (22.02.02):
- Lügen- verdammte Lügen- Statistik- Internetstatistik
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End