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

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Presentation transcript:

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