1. HTML VS PDF USAGE IN JOURNAL PUBLICATIONS Chan Li Sr. Data Analyst California Digital Library 2014 ALA Annual, Las Vegas

2. RESEARCH QUESETION: IS HTML EQUAL TO PDF USAGE?

3. STATISTICAL FINDINGS

4. HTML/PDF RATIOS VARY A LOT AMONG PUBLISHERS

5. HTML/PDF usage ratios are clustered by publisher platform

6. PDF USAGE IS MORE CONSISTENT THAN HTML USAGE OVER YEARS

7. ANOTHER EXAMPLE

8. PDF USAGE HAS STRONGER CORRELATION WITH CITATIONS THAN HTML USAGE

9. CONTRSIBUTING FACTORS

10. DIFFERENT PUBLISHER WEBSITE DESIGN

11. SPRINGER EXAMPLE

12. BASED ON SPRINGER EXAMPLE… 1. Springer: Usage = Total usage- Look Inside 2.Others*: Usage= PDF + 15% HTML??? *Others: the ones that present HTML fulltext automatically

13. ENHANCED HTML JOURNAL ARTICLE

14. VARIOUS ARTICLE TYPES PDF USAGE ≈ RESEARCH ARTICLES? 2013 Journal X Usage: PDF VS HTML Usage Shares Distribution 2013 Journal X Publications: Content Type Distribution

15. FURTHER RESEARCH

16. OTHER AREAS TO EXPLORE 1.Literature review, environmental scan 2.More analysis on citation and usage correlation 3.More evidences on how article types are related to usage in different format 4.How to adjust usage data based on findings? Will journal ranking change based on adjusted usage?

17. Chan Li chan.li@ucop.edu California Digital Library