Interpret the numbers: Putting e-book usage statistics in context
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(2) Interpret the numbers:. Putting e-book usage statistics in context Maria Savova – Director of Information Resources and Systems Madelynn Dickerson – Information Resources Coordinator.
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(4) Goal of the study To understand our e-book usage data by providing meaningful context to the statistics we collect.
(5) Our data viewed through the prism of: • Access type – owned vs. subscribed vs. DDA • Simultaneous user access • Rights restrictions - DRM or not • Publication year • Subject/discipline: o Breadth vs. intensity o In comparison with print o In correlation with user discipline distribution.
(6) Data scope: E-books • E-book holdings as of Jan 2015 (363,691 titles) • E-book usage data for Jan-Dec 2014. www.fernandobiz.com.
(7) Data scope: Print • Print holdings as of Jan 2015 (793,556 titles) • Print circulation statistics Jan – Dec 2014 • Resource sharing statistics for print books borrowed by CCL patrons Jan – Dec 2014.
(8) Excluded from the study o All print and e-books with unknown classification/publication year (~18,000 print books and ~130,000 e-books) o Any e-book collection without available title-bytitle usage (~66,000 titles) o All theses/dissertations in both formats o All government documents (~98,000 e-titles and ~114,000 print titles).
(9) Our data • E-books:. o Detailed holdings and usage data kindly provided by our vendors o Title lists from WMS knowledge base, as well as aggregators and publisher websites o COUNTER BR2: Section requests (in the vast majority of cases) o COUNTER BR1: Title requests (when section request data were not available). • Print books:. o OCLC Analytics holdings data o Local circulation statistics – checkouts + renewals o Titles borrowed via Resource Sharing – aggregated Link+ and ILL data. www.highradius.com.
(10) E-book holdings vs. e-book usage per access type 500000 1%. 450000 400000 350000 300000. 24% 14% 14%. 250000. Owned titles turnover – 2.3. 200000. Subscription titles turnover – 1.3. 150000. 75% 72%. 100000 50000 0 Total holdings. All usage Subscription. Owned. DDA.
(11) E-book holdings vs. e-book usage per access type by discipline 180000. 0.6%. 160000. 9% 2%. 140000 120000 100000. 10% 4%. 22%. 3%. 16%. 6%. 80000. 0.7%. 55% 29%. 91% 88%. 60000 93%. 40000. 72% 55%. 20000. 44% 11% 53% 36%. 0 AH holdings. SS holdings. STEM holdings. 77%. MD holdings Subscription. 0.4%. AH usage Owned. DDA. 23%. SS usage STEM usage MD usage.
(12) Proportion of used e-book titles by access type 400000. 7%. 350000 300000 6% 250000 200000 150000 100000 50000. 6%. 15%. 0 DDA. owned Titles without usage. subscription Titles with usage. Overall.
(13) Average number of uses per used title by access type 25.0 22 20.0 18 15. 15.0. 10.0. 5.0 1.4 0.0 DDA. owned. subscription. Overall.
(14) E-book holdings by simultaneous access model Limited (1-3 users) 1.3%. Unlimited 98.7%.
(15) Proportion of unlimited access holdings vs. unlimited access used titles 98.80%. 98.68%. 98.65% 98.70% 98.60% 98.50% 98.40%. 98.24%. 98.30% 98.20% 98.10% 98.00%. Total holdings. Used titles. Not used titles.
(16) Average number of uses per used title 19.5 19.2 19.0. 18.5. 18.0 17.5. 17.5. 17.0. 16.5 Limited simultaneous access. Unlimited simultaneous access.
(17) E-book holdings by access rights. non-DRM 15%. DRM 85%.
(18) Proportion of DRM vs. non-DRM e-books holdings per subject 50000. 11%. 45000 40000. 13%. 35000 22%. 30000 25000. 20%. 5%. 5%. 60%. 20000. 0.4%. 0.1%. 15000. 9%. 10000 5000. 0.9%. 0.2%. 4%. 1.4%. 45%. 16%. 0.1% 54%. 44%. 13%. 3% 0.1%. 0. DRM. Non-DRM. 42%.
(19) Proportion of used DRM vs. nonDRM e-book titles 120%. 100% 15% 28%. 80%. 60%. 40%. 85% 72%. 20%. 0% Total holdings. Used DRM. Non-DRM.
(20) Proportion of used DRM vs. non-DRM e-book titles per subject 4000 3500. 6%. 3000 2500. 90%. 15%. 11%. 2000. 2%. 9%. 68%. 41%. 1500. 71%. 1000 500 0. 5%. 6%. 2%. 42%. 0.1% 35%. 76%. DRM used. 1%. Non-DRM used. 74%. 1% 5% 26%. 46%.
(21) What does this result mean? http://office.microsoft.com/en-ca/images|. • Non-DRM e-books represent bigger proportion of used titles that than they do of all titles, except in history (non-DRM history e-books are 13% of all holdings, and only 11% of all used titles) • Non-DRM books are more desirable? • Non-DRM books are easier to access? • Non-DRM books are more easily discoverable?.
(22) E-book holdings by publication year 180000 160000. 100 years. 10 years. 1 year. 158,123. 140000 120000 100000 80000 60000 40,528. 40000. 28,869 28,556 21,850. 20000 38. 0. 1,171. 274. 365. 322. 338. 329. 669. E-books. 1,286. 1,997. 7,492. 34,853 23,992.
(23) E-book holdings by publication year in context 180000. 100 years. 160000. 10 years. 1 year. 158,123. 137,199. 140000 120000. 129,046. 108,212 97,038. 100000 75,124. 80000 60000 43,031. 40000. 33,257 26,426. 20000 0. 6,795 189. 823. 4,524. 14,029. 38 1,171. 274. 30,761. 40,528 28,869 28,556. 29,923 21,850. 16,165 365. 322. 34,853. 338. E-books. 329. 669. 1,286. 1,997. Print books. 7,492. 8,232. 23,992 8,296. 9,193. 9,825. 5,468.
(24) 2014 e-book usage stats by publication year 250000 211,264. 200000. 150000. 100000 51,109 41,348. 50000. 30,172. 55,080 37,875 18,205. 0. 77. 21. 37. 20. 44. 43. 224. 1,073. 1,247. 0. Total usage. 5,574.
(25) 2014 e-book usage stats by publication year in context 250000 211,264. 200000. 150000. 100000 51,109 41,348. 50000. 30,172. 55,080 37,875 18,205. 0. 77. 21. 37. 20. 44. 43. 224. 1,073. 1,247. 5,574. 0. Total usage. Total holdings.
(26) Average number of uses per available title 2.50. 1.93. 2.00 1.77. 1.50. 1.34. 1.30 1.09. 1.00. 0.83. 0.74 0.62. 0.50. 0.00. 0.33. 0.00. 0.07. 0.08. 0.10. 0.06. 0.13. 0.13. 0.74. 0.76.
(27) Percentage of available titles with usage in 2014 180000 7%. 160000 140000 120000 100000 80000 60000 6%. 40000. 7%. 20000 0. 3%. 5%. 5%. 3%. 5%. 6%. 6%. 6%. Titles not used. 6%. 5%. Titles used. 9%. 10%. 9% 6%.
(28) Average number of uses per used title 25.00. 20.48. 20.07. 20.00. 20.24. 17.34. 15.00. 14.12. 13.56 11.13. 10.00. 5.60 5.00 2.57 1.50 0.00. 2.06. 1.82. 2.59. 2.05. 13.43. 12.69. 12.38.
(29) Takeaways from publication year analysis • It is essential to correlate titles lists to usage reports – to highlight the titles with zero usage • E-book holdings are quite low through the end of 20th century publication year • E-book publishing picks up in the 1990s and as of the early 2000s it surpasses print holdings • The highest usage per title is observed in e-books published within the last 5-10 years • E-books published between the 1960s and the 1990s however show significant usage as well.
(30) E-book holdings by subject. 47,206. 50000 45000. 34,691. 40000 35000. 37,337. 28,255. 26,106. 30000 25000. 19,534. 20000. 5000. 14,295. 14,211. 15000 10000. 27,888. 25,742. 9,501 3,004. 2,530. 4,941. 5,159. 8,462. 5,694. 8,012. 10,298. 10,064. 8,063 1,373. 0. E-books. 11,326.
(31) E-book holdings by subject in context 200000 180000 160000 140000 120000 100000 80000 60000 40000 20000. 19,534. 28,255. 26,106 11,326. 5,159. 0. E-books. Print books.
(32) Total e-book uses per subject 70000. 59,262. 60000 45,308. 50000 38,504. 44,700 39,275. 37,650. 40000. 32,077. 30000. 22,080 16,356. 20000 10000. 12,091 3,117. 4,960. 6,612 5,334. 10,710. 19,199. 19,082. 14,182. 10,752. 6,415 2,095. 1,172. 0. Uses. 4,806.
(33) Total e-book uses per subject 70000. 59,262. 60000 45,308. 50000. 38,504. 44,700 39,275. 37,650. 40000. 32,077. 30000. 22,080 16,356. 20000 10000. 12,091 3,117. 6,612 5,334 4,960. 10,710. 19,199. 19,082. 14,182. 10,752. 6,415 2,095. 1,172. 0. Uses. 4,806.
(34) Total e-book uses per subject in context 70000 60000 50000 40000 30000 20000 10000 0. Total holdings. Uses.
(35) Average number of uses per available e-title per subject 3.00 2.50. 2.38. 1.96. 2.00. 1.71 1.53. 1.50 1.00 0.50 0.00. 2.04. 1.93. 1.34 1.14. 1.04 0.85. 0.82 0.56. 1.13. 1.21. 1.27. 1.60. 1.53. 1.38. 1.33 0.95. 0.85 0.48. 0.23.
(36) Percentage of available e-book titles with usage in 2014 50000. 5%. 45000 40000. 2%. 35000. 6%. 30000 25000. 8%. 13%. 5%. 15000 5000. 5%. 13%. 20000 10000. 6%. 5% 4%. 8%. 8%. 4%. 8% 5%. 4%. 8%. 10%. 3%. 9% 9%. 0. Titles not used. Titles used. 9%.
(37) Broad usage vs. intensity • The overall turnover of e-book titles is 1.25 – i.e. per average every available title has been used 1.25 times during 2014 • All of e-book usage in 2014 comes from only 7% of all available titles – per subject that number varies between 4% (agriculture, chemistry, and law) and 13% (philosophy & religion).
(38) Average number of uses per used e-book title per subject 35.00 31.69 30.00. 25.00. 28.60 24.94. 24.82. 25.30. 24.88. 21.75 19.84. 20.00. 17.56. 16.41. 15.05. 15.00. 10.00. 0.00. 17.31. 16.37 13.82. 5.30. 18.12. 18.77. 17.24. 15.50 11.71. 11.28. 5.00. 19.55. 10.32. 17.57.
(39) Most and least used titles • • • • •. Reference (dictionary) - 9,428 uses Language, linguistics, & literature book – 3,899 uses Education book – 2,652 uses Sociology title – 2,506 uses History title – 2,359 uses. • • • • •. Geography & earth sciences – 632 uses Physical sciences – 466 uses Physical education & recreation – 377 uses Mathematics & statistics – 308 uses Chemistry - 57 uses.
(40) E-book vs. print books holdings by subject 200000 180000 160000 140000 120000 100000 80000 60000 40000 20000. 19,534. 28,255. 26,106 11,326. 5,159. 0. E-books. Print books.
(41) Print books circulation during 2014, including borrowed via resource sharing 25000 20000 15000 10000 5000 0. Local checkouts. Resource sharing requests.
(42) Section requests Local checkouts Resource sharing requests. Sociology print books Sociology e-books. Psychology print books Psychology e-books. Political science print books Political science e-books. Physical sciences print books Physical sciences e-books. Physical education & recreation print books Physical education & recreation e-books. Philosophy & religion print books Philosophy & religion e-books. Music & performing arts print books Music & performing arts e-books. Medicine & health print books Medicine & health e-books. Mathematics & statistics print books Mathematics & statistics e-books. Library science, generalities & reference print books Library science, generalities & reference e-books. Law print books Law e-books. Language, linguistics & literature print books Language, linguistics & literature e-books. History print books History e-books. Geography & earth sciences print books Geography & earth sciences e-books. Engineering & technology print books Engineering & technology e-books. Education print books Education e-books. Computer science print books Computer science e-books. Chemistry print books Chemistry e-books. Business & economics print books Business & economics e-books. Biological Sciences print books Biological sciences e-books. Art & architecture print books Art & architecture e-books. Anthropology print books Anthropology e-books. Agriculture print books Agriculture e-books. E-book usage compared to print usage. 70000. 60000. 50000. 40000. 30000. 20000. 10000. 0.
(43) Average number of uses per 100 available titles 300.0 250.0. 238 196. 200.0. 171. 150.0. 134 114. 104. 100.0. 121. 113. 153. 138. 127. 160. 153 133. 85. 82. 95. 85. 56. 50.0 0.0. 204. 193. 4. 16. 13. 3. 48 8. 23 5. 4. 9. 6. 4. 10. Turnover rate of print books. 11. 22 2. 9. 10. 17. Turnover rate of e-books. 15. 31 8. 12. 22. 19.
(44) Book holdings and usage statistics vs. user distribution per discipline 2%. 100%. 4%. 2%. 11%. 90% 80%. 3%. 37%. 29%. 17% 28%. 32%. 31% 28%. 70%. 24%. 60% 35%. 50% 40%. 31% 35%. 31%. 41%. 30%. 56%. 20% 10%. 35%. 30%. 37%. 36%. E-book usage. E-book used titles. 61%. 21%. 0% Students. Faculty. E-book holdings AH. SS. STEM. MD. Print book Print book holdings checkouts.
(45) THANK YOU! QUESTIONS?. [email protected] [email protected].
(46)
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