A System-wide Perspective on SCELC Library Collections
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The world’s libraries. Connected.
A System-wide Perspective on SCELC Library Collections
SCELC Colloquium, 6 March 2013
Constance Malpas
Program OfficerOCLC Research
Follow me @ConstanceM
With thanks to Brian Lavoie
The world’s libraries. Connected.
Aggregate resource comprising millions of titles, tense of millions of WorldCat holdings, including
~1M titles unique in WorldCat ‘system’
Diverse range of institution and library types with robust resource sharing network … an ecosystem
Membership spans 3 mega-regions: NorCal, SoCal and Dal-Austin
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• SCELC eco-system: resources & infrastructure
• Mega-regional context: NorCal & SoCal
• Right-scaling stewardship solutions
Overview
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SCELC EcosystemGroup Scale
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0 500,000 1,000,000 1,500,000 2,000,000 2,500,000 3,000,000
-20%
0%
20%
40%
60%
80%
100%
Growth in SCELC Library Holdings in WorldCatJan 2012 – Jan 2013
SCELC Member Holdings in WorldCat
Per
cen
t G
row
th
Median holdings in January 2013: 110K titlesMedian growth Jan 2012 – Jan 2013: +2%
Considerable volatility at institutional scaleA few libraries exhibit negative growthCollectively, a pattern of moderate, sustained growth
OCLC Research, 2013
Based on analysis of 104 SCELC holding symbols; some outliers have been excluded from this graph to improve legibility.
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Institutional Infrastructure
Library Type Percent of SCELC Library Population
Percent of SCELC Aggregate Holdings
Non-ARL Academic 82% 77%
Special 13% 10%
ARL 2% 13%
Other 3% <1%
Non-ARL academic libraries constitute majority of SCELC membership and hold more than 75% of aggregate inventory
** Institutions with stewardship mandate and preservation capacity
*( )
OCLC Research, 2013
Based on analysis of 104 SCELC holding library symbols
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1 2 to 9 10 to 24 25-99 >990%
10%
20%
30%
40%
50%
60%
70%
Average Distribution of WorldCat Holdings for Titles in SCELC Member Libraries
Holding Libraries (WorldCat)
10% held by <10 libraries 6% held by 10-24 libraries 19% held by 25-99 libraries 65% held by >99 libraries
Based on average WorldCat holdings distribution for 104 SCELC libraries
OCLC Research, 2013
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NorCal and SoCalMega-regional perspective
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http://www.maps.com/map.aspx?pid=17252
Where to draw the line?
What does the distribution of library resources tell us?
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• Mega-regions differ from informal NorCal, SoCal boundaries because they reflect the actual organization of regional economic activity
• A useful framework for examining distribution of library resources and infrastructure, a ‘natural unit’ of measure
• Helps situate print management within broader networks of economic exchange; builds on existing organizational infrastructure and institutional interests
Why focus on ‘mega-regions’?
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Print Books in California Mega-Regions
NorCal SoCal
Regional print book collection• 12,481,999 discrete titles
• 40,154,364 holdings in 775 libraries
• 3.22 holdings per title on average
• Median age: 23 (i.e. published 1988)
Regional print book collection• 9,771,974 discrete titles
• 39,969,816 holdings in 774 libraries
• 4.09 holdings per title on average
• Median age: 30 (i.e. published 1981)
OCLC Research, 2013
21% of print book titles in North America> 900K titles unique to SoCal
27% of titles in North America>1.5M titles unique to NorCal
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Print Book Holdings by Library Type
NorCal SoCalN = 40M holdings N = 40M holdings
OCLC Research, 2013
Majority of regional print book inventory is held by academic libraries
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Print Book Holdings by Academic Library Type
NorCal SoCalN = 22M academic holdings N = 26M academic holdings
20%
35% 37%
27%
OCLC Research, 2013
…mostly in non-ARL academic libraries
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Regional collections are complementary
NorCal
SoCal
duplicates 63% of SoCal collection
duplicates 49% of NorCal collection
>6M titles not duplicated in SoCal
Each enriches scope of collective resource
Each contributes preservation value
>3MK titles not duplicated in NorCal
OCLC Research, 2013
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Summing up
• More titles, more holdings
• Less duplication at intra-regional and inter-regional scale
• Lesser part of inventory held by ARLs
• Fewer options for redistribution of stewardship
• Fewer titles, fewer holdings
• More duplication at intra-regional and inter-regional scale
• Greater part of inventory held by ARLs
• More options for redistribution of stewardship
NorCal SoCal
OCLC Research, 2013
Regional context for shared print management differs
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SCELC in System-wide Context
Scaling up
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• On average, print book titles account for ~75% of individual SCELC library holdings in WorldCat
• As of January 2013, an aggregate resource of nearly 5.3M discrete titles, 13.7M holdings
Print Books in SCELC Libraries
January 2011 January 20134,700,000
4,800,000
4,900,000
5,000,000
5,100,000
5,200,000
5,300,000
4,948,924
5,271,295
Print Book Titles in SCELC Libraries
• Average 2.6 SCELC holdings per title
• Scope of collection is growing +7%
OCLC Research, 2013
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Scale Matters: Assessing Print Preservation Risks
N = 5,271,295 titles
~86% of print books in SCELC collective collection are held by fewer than 5 libraries in group
OCLC Research, 2013
The world’s libraries. Connected.
Scale Matters: Assessing Print Preservation Risks
N = 5,271,295 titles
~86% of print books in SCELC collective collection are held by fewer than 5 libraries in group
~16% of print books in ASERL/WRLC collective collection are held by fewer than 5 libraries in WorldCat
OCLC Research, 2013
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What do SCELC libraries have to offer as a regional preservation asset?
Probably not.
28% of the NorCal regional collection
47% of the SoCal regional collection
does SCELC want to assume sole responsibility for managing these books as a regional resource?
Collectively, SCELC libraries hold 5.3M print book titles, representing
(NorCal duplicates 70% of SCELC)
(SoCal duplicates 93% of SCELC)
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Could SCELC libraries strike bargains with regional print management hubs?
Very Large Repository X
Very Large Repository Y
Might provide preservation / access services for average 15% of SCELC holdings in NorCal
Might provide preservation / access services for average 16% of SCELC holdings in SoCal
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A cooperative preservation and access strategy
CAACTTJP
CUHPPI
LUB
FPDM
ECG
TXCC9
OR3
DSRM
IOSYF
STACUF
WR$
SXQCKV
QP9
CPCCNU
KDMJP
GCAF
CMM
CCTCSM
LGVTG
WCW
ECW
SHUV
CAPCAM AI#
CWC
CCXLX
LCSL
CPTCIT
CURCDU
LMR
RSM
0%
5%
10%
15%
20%
25%
30%
35%
40%
45%
50%
SCELC Library Overlap with Regional Repositories
NorCal repository SoCal repository
might recover >8K linear feet of shelf space
might recover >15K linear feet of shelf space
OCLC Research, 2013
The world’s libraries. Connected.
0 500,000 1,000,000 1,500,000 2,000,000 2,500,000 3,000,0000%
10%
20%
30%
40%
50%
60%
70%
Duplication between SCELC Library Collections and HathiTrust Digital Library
Holdings in WorldCat
Per
cen
t o
f H
old
ing
s D
up
licat
ed in
Hat
hiT
rust
What can SCELC libraries worry less about preserving?
About 30% of your collection, on average
3%
26% in copyright
public domain
As of January 2012.
OCLC Research, 2013
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Where should SCELC libraries be focusing more preservation effort?
1 to 4 libraries 5 to 9 libraries 10-24 libraries 25 to 99 libraries >99 libraries0
200,000
400,000
600,000
800,000
1,000,000
1,200,000
1,400,000
1,600,000
1,800,000
WorldCat Holdings for Print Book Titles in SCELC Libraries
Preserve as institutional
assets
Look to other partners
Strike agreements
within SCELC
N = 5,271,295 titles
OCLC Research, 2013
The world’s libraries. Connected.
• SCELC libraries manage a significant collective resource for which traditional, institution-scale stewardship models may not be sustainable.
• Assessing preservation risks at group scale may lead to misjudgments about locus and level of investment.
• Scaling up to regional and network level infrastructure reveals more opportunities to redistribute and ‘right-scale’ stewardship solutions.
Parting Thoughts
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Thanks for your attention.
malpasc@oclc.org
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