www.jstor.orgwww.jstor.org

Linking between JSTOR and other resources

Spencer W. Thomas

Kevin Guthrie

Beth Kirschner

Overview

• Mission and Update

• Challenges

• JSTOR’s linking facilities

• User reaction to JSTOR – some implications for linking?

JSTOR’s Not-for-Profit Mission

• Help the scholarly community take advantage of advances in information technologies

• Develop a trusted archive of core scholarly journal literature, emphasizing conversion of entire journal backfiles and preservation of future e-versions

• Enhance the accessibility of older journal literature

In pursuing its mission, JSTOR takes a system-wide perspective, seeking benefits for libraries, publishers and scholars & students

How are We Doing?

• Five Archive Collections, 9 million pages total• Nearly 1,300 institutions signed up from 60

countries• 2001 usage:

- 6.3 million articles printed

- 12.8 million searches

- 50.2 million total accesses

• Are we adding new collections fast enough?

JSTOR Accesses 1997 – 2001

0

1,000,000

2,000,000

3,000,000

4,000,000

5,000,000

6,000,000

7,000,000

8,000,000

Archive Coverage

• Scope of JSTOR’s archive– 218 titles in 24 disciplines (22 Math+Stats)– 698,406 full length articles (116,723 M+S)– 9,183,416 pages (1,305,979 M+S)– 16+ linking partners (current or in discussion)– Hundreds of years– Not “born digital”

Challenges…

• Solutions must work across broad topical range

• Solutions must work for historical material

• Solutions should work for individual researcher or large A&I database

Linking into JSTOR

• Serial Item Contribution Identifier: SICI

• Tools to build and check SICIs

• SICI resolution to article, issue, or list

JSTOR Linking Server

JSTOR and LinkingHow and Why

The Independence of Peano's Fourth Axiom from Martin-Lof's Type Theory Without Universes Jan M. Smith Journal of Symbolic Logic, Vol. 53, No. 3. (Sep., 1988), pp. 840-845.

JSTOR and LinkingHow and Why

/fcgi-bin/jstor/viewitem.fcg/00224812/di985236/98p00714/0

ID: 00224812 DI985236 98P00714

The Independence of Peano's Fourth Axiom from Martin-Lof's Type Theory Without Universes Jan M. Smith Journal of Symbolic Logic, Vol. 53, No. 3. (Sep., 1988), pp. 840-845.

JSTOR and LinkingHow and Why

/fcgi-bin/jstor/viewitem.fcg/00224812/di985236/98p00714/0

ID: 00224812 DI985236 98P00714

/sici?sici=0022-4812%28198809%2953%3A3%3C840%3ATIOPFA%3E2.0.CO%3B2-B

ID: 0022-4812(198809)53:3<840:TIOPFA>2.0.CO;2-B

The Independence of Peano's Fourth Axiom from Martin-Lof's Type Theory Without Universes Jan M. Smith Journal of Symbolic Logic, Vol. 53, No. 3. (Sep., 1988), pp. 840-845.

SICI Matching

• ISSN (must match!)

• Other elements by priority order– Date– Numeration (vol/issue, e.g.)– Page number– Title code

• Multiple matches are possible

Individual Citation Tool

SICI generation for linking

• Linking partner generates SICIs.

• CheckSici tool: generate a SICI from citation info, or check a single SICI.

• BulkSici tool: validate a list of SICIs, return results by email.

Linking Partner: MathSciNet

Linking Partner: CDL

Linking Partner: Ecol. Soc. Am.

Linking Partners

• Linking Partners: A&I services: ABC-CLIO, PCI, OCLC First

Search, EBSCOHost, MathSciNet, … Ex Libris (SFX) Libraries/consortia: Calif DL, Decomate,

OhioLink, many others Publishers: Ecological Society of America,

University of Chicago Press, Blackwell, …

Linking from JSTOR

• Links to “current content” online

• Fill the gap between JSTOR archive and publisher’s electronic holdings

• Complement existing links from publisher online to JSTOR

• Planned release mid-2002

Math Reviews – JSTOR Use

Year Successful links

Total math views/prints

% of Views

2000 52,000 (est) 187,954 / 108,631

28%

2001 77,655 206,322 / 194,505

38%

2002

to 14 March

17,677 56,342 / 47,439

31%

Usage by Discipline - 2001

Year

Total

Accesses

% of

Accesses

% of

Pages

Mathematics 1,007,594 2.7% 14.2%

Economics 6,326,530 16.8% 11.7%

History 5,452,743 14.6% 12.3%

Relationship Between JSTOR Use and Citations by Discipline

1.0

1.5

2.0

2.5

3.0

3.5

4.0

0 1 2 3

0 1 2 3

0 1 2 3

Citations 1998-2001

Lo

g1

0 P

rin

ts

Social Sciences Mathematics Humanities

R-Squared = 0.4364

R-Squared = 0.1218

R-Squared = 0.3847

Interpretation

• Overall citations do not predict JSTOR use well at all. In other words, highly cited articles are not more likely to be highly used.

• It also means usage is not dominated by users trying to build a citation list, or by people coming to articles because they saw them cited in another article

• There are variations by discipline. Citations and articles printed from JSTOR are more related in Economics and History than in Mathematics

Relationship Between JSTOR Use and Age of the Article, by

Discipline

1.0

1.5

2.0

2.5

3.0

3.5

4.0

1920 1940 1960 1980 2000

1920 1940 1960 1980 2000

1920 1940 1960 1980 2000

Publication Year

Lo

g1

0 P

rin

ts

Social Sciences Mathematics Humanities

R-Squared = 0.0367

R-Squared = 0.067R-Squared = 0.467

Interpretations

• Overall, age of the article does not predict JSTOR use

• More recent articles are not more likely to be highly used than older articles

• There are variations by discipline. History journals show the highest correlation between the age of the article and use. People using history journals seem to be using more recent articles.

www.jstor.orgwww.jstor.org

Linking between JSTOR and other resources

Spencer W. Thomas

Kevin Guthrie

Beth Kirschner