Does Use of E-Books Impact Use of P-Books?

Electronic Resources & LibrariesAustin, April 4, 2012

Christopher C. BrownMichael Levine-Clark

Does Use of P-Books Impact Use of E-Books?

Methodology

Publisher A

• U.S. University Press• Added Dec 2008• Purchase all e/p• 1,368 e-books

– Frontlist approximately 120 per year– Backlist

• 2,175 p-books• 888 in both formats

Publisher B

• Large STM• Added January 2009• Purchase all e• 27,825 e-books

– Frontlist approximately 4,000 per year– Backlist

• 18,693 p-books• 4,099 in both formats

The Data

• Gathered circ data – Through December 2008– Each subsequent December (2009-2011)– Cumulative

• Compiled e-book use data– At end of each year, 2009-2011– For each year

Apples and Oranges

• pBook checkouts– Undergrad: 3 weeks– Grad: 10 weeks– Faculty: 1 year– Potentially many uses per checkout, and some

when deciding to checkout

• eBook use– One time in the book is one use

About Discovery and Data

• Discovery through catalog records• Data merger issues:

– Title variations– ISBN complexities– Multi-volume issues

E and P Typically Pattern Together in Results

Classic Catalog

Encore (next-gen) Catalog

Data Difficulties: Title VariationsCatalog Record Vendor RecordThe Sri Lanka reader : history, culture, politics / John Clifford Holt, ed.

World Readers : Sri Lanka Reader : History, Culture, Politics

Julia Child's The French chef / Dana Polan. Spin Offs : Julia Child's The French ChefStrange affinities : the gender and sexual politics of comparative racialization / edited by Grace Kyungwon Hong & Roderick A. Ferguson.

Perverse Modernities : Strange Affinities : The Gender and Sexual Politics of Comparative Racialization

The war machines : young men and violence in Sierra Leone and Liberia / Danny Hoffman.

Cultures and Practice of Violence : War Machines : Young Men and Violence in Sierra Leone and Liberia

Uomo delinquente. English.Criminal man / Cesare Lombroso ; translated and with a new introduction by Mary Gibson and Nicole Hahn Rafter, with translation assistance from Mark Seymour.

Criminal Man

Hegel e la libertà dei moderni. English Hegel and the freedom of moderns / Domenico Losurdo ; translated from the Italian by Marella and Jon Morris.

Hegel and the Freedom of Moderns

Perversion and the social relation / Molly Anne Rothenberg, Dennis Foster, and Slavoj Žižek, editors.

SIC, Volume 4 : Perversion and the Social Relation

Vendors and catalogers don’t necessarily agree on title formation.

Data Difficulties: Multiple ISBNs

Data Difficulties: ISBN 10? ISBN 13?

Data Difficulties: ISBN Irregularities

Note the ISBN10 with ISBN 13, the parentheses, and the multiple ISBN numbers

Data Solution: Create an ISBN 9

ISBN 9 eliminates the ISBN 13 – 978 prefix and the final check-digit, creating a useable match-point, in cases where the electronic and print versions agree on base ISBN.

Data Methodology using Microsoft Access

• Get use annual use stats of ebooks from vendor• Get master list of e titles from vender. • Derive ISBN9 for each list for proper overlay• Overlay annual use stats onto master list of e books• Get circ stats for print books from ILS• Derive master list of all print titles from ILS• Derive ISBN 9 for each p title.• Overlay annual circ stats onto master list of p books• Merge circ and use data together• Repeat for other publisher!

Data Conclusions

• Microsoft Access for overlays; Microsoft Excel for analysis

• Better standards are needed – a single ISBN, please!

• Overlay on title is nearly impossible• Deriving an “ISBN9” was the only way to get

anywhere, but even this was far from perfect

Usage

eBooks• Publisher A

– 502 titles used (36.7%)– 27,640 uses

• 55.1 per title used• 20.2 per title

– 866 titles not used• Publisher B

– 576 titles used (2.1%)– 3,930 uses

• 6.8 per title used• 0.1 per title

– 27,249 titles not used

pBooks• Publisher A

– 1,435 titles used (66.0%)

– 4,196 checkouts (2,727 before Dec 2008)

• 2.9 per title used• 1.9 per title

– 740 titles not used• Publisher B

– 7,103 titles used (38.0%)– 16,778 checkouts (13,570

before Dec 2008)• 2.4 per title used• 0.9 per title

– 11,590 titles not used

Most Used eBooks, Publisher A

• Poor People’s Politics: Peronist Survival Networks and the Legacy of Evita (2001) – 2,174 uses (all in 2011)– 4 checkouts (1 before Dec 2008, 1 in 2010, 2 in 2011)

• Museum Frictions: Public Cultures/Global Transformations (2006)– 1,003 uses (824 in 2010)– 4 checkouts (2 before Dec 2008, 1 in 2010, 1 in 2011)

Most Used eBooks, Publisher B

• Automata, Languages, and Programming: Sixth Colloquium (1979)– 606 uses (561 in 2011)– 0 checkouts

• Naive Lie Theory (2008)– 46 uses (45 in 2009)– 0 checkouts

Most Used pBooks, Publisher A

• Argumentative Turn in Policy Analysis and Planning (1993)– 37 checkouts (36 before Dec 2008)– 9 uses of the e-version

• Culture, Power, Place: Explorations in Critical Anthropology (1997)– 24 checkouts (21 before Dec 2008)– 14 uses of the e-version (11 in Dec 2008)

Most Used pBooks, Publisher B

• Resilience and Development: Positive Life Adaptations (1999)– 18 checkouts (17 prior to Dec 2008– 0 uses of the e-version

• AIDS in Africa (2002)– 17 checkouts (15 prior to Dec 2008)– 0 uses of the e-version

Dual Format Use• Publisher A

– 325 titles used in both formats• 20,619 e-book uses

– 63.5 per title used• 1,229 p-book checkouts (743 before Dec 2008)

– 3.8 per title used

• Publisher B– 356 titles used in both formats

• 2,566 e-book uses– 7.2 per title used

• 930 p-book checkouts (422 before Dec 2008)– 2.6 per title

P Used, E Not

• Publisher A– 394 titles– 952 checkouts

• 2.4 per title used

• Publisher B– 1,401 titles– 2,547 checkouts

• 1.8 per title used

E Used, P Not

• Publisher A– 177 titles– 7,021 uses

• 39.7 per title

• Publisher B– 219 titles– 1,364 uses

• 6.2 per title

eBook Usage Levels (per title)

pBook Usage Levels (per title)

How Closely Are P/E Usage Linked?

Increased Checkouts, 2008-2011

• For titles available at the start of the project (Dec 2008), how many more checkouts were there by Dec 2011?

• Was that increase linked in any way to e-usage?

Increased Checkouts 2008-2011• Publisher A

– 1,057 titles with increased checkouts– 707 had no e-availability– 192 also had e-use

• 75.6 uses per title – 158 had no e-use

• Publisher B– 2,023 titles with increased checkouts– 1,398 had no e-availability– 177 also had e-use

• 7.0 uses per title– 449 had no e-use

Observations

• Use of E doesn’t seem to lead to use of P• Use of P doesn’t seem to lead to use of E• If both formats are used, they are both used

at a higher rate than average

Further Questions

• Might there be differences – By subject?– By date?

• What sort of measure of time in a book can we look at?

• How does discovery play in?

Thank You