SCELC Colloquium Perspective on Regional Library Collections

SCELC Colloquium, 6 March 2013

A System-wide
Perspective on SCELC
Library Collections
Constance Malpas
Program Officer
OCLC Research

Follow me @ConstanceM

The world’s libraries. Connected. With thanks to Brian Lavoie

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

The world’s libraries. Connected.

Overview

• SCELC eco-system: resources & infrastructure
• Mega-regional context: NorCal & SoCal
• Right-scaling stewardship solutions


Group Scale

SCELC Ecosystem


Growth in SCELC Library Holdings in WorldCat
Jan 2012 – Jan 2013
100%

Median holdings in January 2013: 110K titles
80%
Median growth Jan 2012 – Jan 2013: +2%

60%
Considerable volatility at institutional scale
Percent Growth

A few libraries exhibit negative growth
40% Collectively, a pattern of moderate, sustained growth

20%

0%
0 500,000 1,000,000 1,500,000 2,000,000 2,500,000 3,000,000
SCELC Member Holdings in WorldCat

-20%

Based on analysis of 104 SCELC holding symbols; some outliers have been excluded from this graph to improve legibility.

The world’s libraries. Connected. OCLC Research, 2013

Institutional Infrastructure

Non-ARL academic libraries constitute
majority of SCELC membership and hold
more than 75% of aggregate inventory

Library Type Percent of SCELC Percent of SCELC
Library Population Aggregate Holdings
Non-ARL Academic 82% 77%
(
* ) Special
ARL
13%
2%
10%
13%
* Other 3% <1%

* Institutions with stewardship mandate and preservation capacity

Based on analysis of 104 SCELC holding library symbols


Average Distribution of WorldCat Holdings
for Titles in SCELC Member Libraries

70%
10% held by <10 libraries
60% 6% held by 10-24 libraries
19% held by 25-99 libraries
50%
65% held by >99 libraries
40%

30%

20%

10%

0%
1 2 to 9 10 to 24 25-99 >99
Holding Libraries (WorldCat)

Based on average WorldCat holdings distribution for 104 SCELC libraries


Mega-regional perspective

NorCal and SoCal


Where to draw the line?

What does the distribution of
library resources tell us?

The world’s libraries. Connected. http://www.maps.com/map.aspx?pid=17252

Why focus on ‘mega-regions’?

• 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


Print Books in California Mega-Regions

NorCal SoCal

Regional print book collection Regional print book collection
• 12,481,999 discrete titles • 9,771,974 discrete titles

• 40,154,364 holdings in 775 libraries • 39,969,816 holdings in 774 libraries
• 3.22 holdings per title on average • 4.09 holdings per title on average

• Median age: 23 (i.e. published 1988) • Median age: 30 (i.e. published 1981)

27% of titles in North America 21% of print book titles in North America
>1.5M titles unique to NorCal > 900K titles unique to SoCal


Print Book Holdings by Library Type

Majority of regional print book inventory is held by academic libraries

NorCal SoCal
N = 40M holdings N = 40M holdings


Print Book Holdings by Academic Library Type

…mostly in non-ARL academic libraries

NorCal SoCal
N = 22M academic holdings N = 26M academic holdings

35% 37%

20% 27%


Regional collections are complementary

Each enriches scope of collective resource

NorCal
>6M titles not duplicated in SoCal duplicates 63% of SoCal collection

SoCal
>3MK titles not duplicated in NorCal duplicates 49% of NorCal collection

Each contributes preservation value


Summing up

Regional context for shared print management differs

NorCal SoCal

• More titles, more holdings • Fewer titles, fewer holdings
• Less duplication at intra- • More duplication at intra-
regional and inter-regional regional and inter-regional
scale scale
• Lesser part of inventory held • Greater part of inventory held
by ARLs by ARLs
• Fewer options for • More options for redistribution
redistribution of stewardship of stewardship


Scaling up

SCELC in
System-wide
Context


Print Books in SCELC Libraries

• 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 Book Titles
• Average 2.6 SCELC in SCELC Libraries
holdings per title 5,300,000 5,271,295

5,200,000

• Scope of collection is 5,100,000
5,000,000 4,948,924 +7%
growing 4,900,000
4,800,000
4,700,000
January 2011 January 2013


Scale Matters: Assessing Print Preservation Risks

~86% of print
books in SCELC
collective
collection are
held by fewer
than 5 libraries
in group

N = 5,271,295 titles


Scale Matters: Assessing Print Preservation Risks
~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
N = 5,271,295 titles


What do SCELC libraries have to offer as a regional preservation asset?

Collectively, SCELC libraries hold 5.3M print book
titles, representing

28% of the NorCal regional collection
(NorCal duplicates 70% of SCELC)

47% of the SoCal regional collection
(SoCal duplicates 93% of SCELC)

does SCELC want to assume sole responsibility for
managing these books as a regional resource?
Probably not.

Could SCELC libraries strike bargains with regional print management hubs?

Might provide
preservation / access
Very Large services for average
Repository X 15% of SCELC
holdings in NorCal

Might provide
preservation / access
Very Large services for average
Repository Y
16% of SCELC
holdings in SoCal


A cooperative preservation and access strategy
SCELC Library Overlap with Regional Repositories
NorCal repository SoCal repository
50%

45%

40%
might recover
35%
>15K linear feet
30% of shelf space
might recover
25% >8K linear feet
of shelf space
20%

15%

10%

5%

0%
WR$

WUOHS
SP1

GTX
SJG

SYF

ANTIO

JPG
SKN

PPI

CHM
DSR

CPU

ACD

CBC
CAACT

CIJ
FPD

MGSOL

STA

SRQ

CPC

KDM
HN#

GGB

CC9
GGY
OR3
GH0

C5U

CSM
CUF
UOP

LFE
TJP

QP9

CCT
MEC

C7M

YU0
CUH

CKV

CAF
MIO

MIQ

CHC

SCB
CNU

CMM

LGV

CBF
CIA

CFT
LUB

SXQ

MXL

TGW
CAW


What can SCELC libraries worry less about preserving?

Duplication between SCELC Library Collections
and HathiTrust Digital Library
70%
Percent of Holdings Duplicated in HathiTrust

60%
About 30% of your collection, on average
50%

40%

30%
26% in copyright
20%

10%
3%
public domain
0%
0 500,000 1,000,000 1,500,000 2,000,000 2,500,000 3,000,000

Holdings in WorldCat
As of January 2012.


Where should SCELC libraries be focusing more preservation effort?

WorldCat Holdings for Print Book Titles in SCELC Libraries

1,800,000
Look to other
partners
1,600,000 Preserve as
institutional Strike
1,400,000 assets agreements
1,200,000
within SCELC

1,000,000

800,000

600,000

400,000

200,000

0
1 to 4 libraries 5 to 9 libraries 10-24 libraries 25 to 99 libraries >99 libraries
N = 5,271,295 titles


Parting Thoughts

• 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.


malpasc@oclc.org

Thanks for your
attention.


SCELC Colloquium Perspective on Regional Library Collections

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