RLG Programs Rarity is Common

RLG Programs

Rarity is common:Collection Analysis of four NYC Art Libraries

Günter WaibelRLG Programs, OCLC

Milan HughstonMuseum of Modern Art

ARLIS/NA Denver4 May 2008

RLG Programs Rarity is Common - Collection Analysis of four NYC Art Libraries

Günter Waibel - ARLIS 2008

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Four NYC art libraries…Introducing: NYARC

New York Art Resources ConsortiumBrooklyn Museum LibraryFrick Art Reference LibraryMetropolitan Museum of Art, Thomas J. Watson LibraryMuseum of Modern Art Library



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Collection Analysis…

What is aggregate collection analysis?Analyzes combined holdings of multiple institutions as a single (aggregate) collectionShows Patterns of overlap; uniquely-held materialsBusiness intelligence for decisions about collaboration



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Background - NYARC Collection Analysis

The situation

The dataExtracts from RLG Union Catalog & SCIPIO (January 2007)Disclaimer

The report:http://www.oclc.org/programs/publications/reports.htm

http://www.oclc.org/programs/publications/reports.htm



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I.The NYARC Aggregate

Collection



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Combined NYARC HoldingsBrooklyn, Frick, Met, MoMA

Unique TitlesRUC: 831,657SCIPIO: 130,633Total: 962,290

Legend:RUC = RLG Union CatalogSCIPIO = Auction Catalogsas of January 2007



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Holdings OverlapRUC(-unique) + SCIPIO

Legend:RUC (-unique)= excluding “intrinsically unique”“intrinsically unique” = 117,488 records coded as “collections”



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Degree of local uniquenessRUC(-unique) + SCIPIO

Individual Institutions vis-à-vis NYARC57% - 70% of each individual institution unique

Individual Institutions vis-à-vis each other87% - 96% of uniqueness in 1-on-1 comparison

Legend:RUC (-unique)= excluding “intrinsically unique”“intrinsically unique” = 117,488 records coded as “collections”



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II.Characteristics of the NYARC

Aggregate Collection



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Monographs85%

Collections12%

Other1%

Serials2%

RUC: 156 different languages identifiedTop 5:English 48 percentGerman 12 percentFrench 11 percentItalian 7 percentSpanish 3 percent

0

20000

40000

60000

80000

100000

120000

140000

pre-17

0017

11-17

2017

31-17

4017

51-17

6017

71-17

8017

91-18

0018

11-18

2018

31-18

4018

51-18

6018

71-18

8018

91-19

0019

11-19

2019

31-19

4019

51-19

6019

71-19

8019

91-20

00

69,210 publishedbefore 1923



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III.The NYARC Aggregate Collection in context



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0

50000

100000

150000

200000

250000

300000

3500001

2 –

10

11 –

20

21 –

30

31 –

40

41 –

50

51 –

60

61 –

70

71 –

80

81 –

90

91 –

100

101

– 11

0

111

– 12

0

121

– 13

0

131

– 14

0

141

– 15

0

151

– 16

0

> 16

0

Size of Cluster

Num

ber o

f Clu

ster

sNYARC vis-à-vis the RLG Union Catalog

Chicago Manual of Style14th Edition

Chicago Manual of Style13th Edition

Guide to Reference Books10th Edition

33% of NYARC

titles unique



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NYARC vis-à-vis SCIPIO

0

5000

10000

15000

20000

25000

30000

35000

1 3 5 7 9 11 13 15 17 19 21 23 25 27 44

Size of Cluster

Num

ber o

f Clu

ster

s

Works of Art from the Bute CollectionChristie, Manson, and Woods

Old Master PaintingsSotheby’s

Collection LagerfeldChristie’s Monaco S.A.M

23% of NYARC

titles unique



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NYARC* vis-à-vis WorldCat*not including auction catalogs

050,000

100,000150,000200,000250,000300,000350,000

011

to 50

101 t

o 200

301 t

o 400

501 t

o 600

701 t

o 800

901 t

o 100

020

01 to

3000

4001

to 50

00

WC Libraries Holding Title

Num

ber

of N

YAR

C Ti

tles 39% of NYARC

titles unique



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NYARC vis-à-vis other research libraries

vis-à-vis NYPL, Columbia and NYU

Overlap: 34 percent (~1/3)Uniqueness: 66 percent (~2/3)

vis-à-vis Getty Research Institute

Overlap: 21 percent (~1/5)Uniqueness: 79 percent (~4/5)



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Parting thoughts…

Uniqueness: collaborate for extending your reachResource sharing, digitization…

Overlap: collaborate for economic benefitShared storage, joint collection development…