HTML VS PDF USAGE IN JOURNAL PUBLICATIONS Chan Li Sr. Data Analyst California Digital Library 2014 ALA Annual, Las Vegas
RESEARCH QUESETION: IS HTML EQUAL TO PDF USAGE?
STATISTICAL FINDINGS
HTML/PDF RATIOS VARY A LOT AMONG PUBLISHERS
HTML/PDF usage ratios are clustered by publisher platform
PDF USAGE IS MORE CONSISTENT THAN HTML USAGE OVER YEARS
ANOTHER EXAMPLE
PDF USAGE HAS STRONGER CORRELATION WITH CITATIONS THAN HTML USAGE
CONTRSIBUTING FACTORS
DIFFERENT PUBLISHER WEBSITE DESIGN
SPRINGER EXAMPLE
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
ENHANCED HTML JOURNAL ARTICLE
VARIOUS ARTICLE TYPES PDF USAGE ≈ RESEARCH ARTICLES? 2013 Journal X Usage: PDF VS HTML Usage Shares Distribution 2013 Journal X Publications: Content Type Distribution
FURTHER RESEARCH
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?
Chan Li California Digital Library