Research Metrics: Author Metrics

Calculating the h-index with Citation Reports in Web of Science

Link out to Web of Science

Harzing's Publish or Perish Software

Publish or Perish (PoP)

PoP is a free software program that retrieves and analyzes academic citations. It uses Google Scholar to obtain the raw citations, then analyzes these and presents the following statistics:

  • Total number of papers
  • Total number of citations
  • Average number of citations per paper
  • Average number of citations per author
  • Average number of papers per author
  • Average number of citations per year
  • Hirsch's h-index and related parameters
  • Egghe's g-index
  • The contemporary h-index
  • The age-weighted citation rate
  • Two variations of individual h-indices
  • An analysis of the number of authors per paper.

This blog post gives a simple "how-to" guide to getting started with the software.

There is also an accompanying book (print available in the library):

The publish or perish book : your guide to effective and responsible citation analysis / Anne-Wil Harzing

Handbook: Maximising the Impact of your Research

This handbook provides evidence-based advice and guidance on how to ensure that your work achieves its maximum visibility and influence with both academic and external audiences. Directed at social scientists, but broadly useful for all academics.

Free Download.

Executive Summary.

Produced by the London School of Economics (LSE) Impact of Social Sciences project.

Some Definitions

Hirsch's h-index

Proposed by J.E. Hirsch (2005) in his paper An index to quantify an individual's scientific research output, arXiv:physics/0508025. It aims to provide a robust single-number metric of an academic's impact, combining quality with quantity.

Egghe's g-index

Proposed by Leo Egghe in his paper Theory and practice of the g-index, Scientometrics, Vol. 69, No 1 (2006), pp. 131-152. It aims to improve on the h-index by giving more weight to highly-cited articles.

Zhang's e-index

The e-index was proposed by Chun-Ting Zhang in his paper The e-index, complementing the h-index for excess citations, PLoS ONE, Vol 5, Issue 5 (May 2009), e5429. The e-index is the (square root) of the surplus of citations in the h-set beyond h2, i.e., beyond the theoretical minimum required to obtain a h-index of 'h'. The aim of the e-index is to differentiate between scientists with similar h-indices but different citation patterns.

  **See more metric definitions on Dr. Harzing's website.

Open Access Increases Impact

There is now considerable evidence that open access (OA) articles are more highly cited. This is known as the OA Citation Advantage.

The Open Access Citation Advantage Service - maintains a list of studies on this.

To increase the impact of your research, and increase your citations, make your articles OA. There are two ways to do this:

  • publish your articles in an open access journal
  • deposit copies of your articles in an online repositiory (most publishers will allow this - see Sherpa/Romeo for publisher policies)

Learn more about OA on the Open Access guide.