Some Comments on the Question Whether Co-Occurrence Data Should Be Normalized

6 Pages Posted: 9 Apr 2008

See all articles by Ludo Waltman

Ludo Waltman

Erasmus University Rotterdam - Faculty of Economics and Business

Nees Jan van Eck

Erasmus University Rotterdam - Erasmus School of Economics

Multiple version iconThere are 2 versions of this paper

Date Written: 25 2008 3,

Abstract

In a recent article in JASIST, L. Leydesdorff and L. Vaughan (2006) asserted that raw cocitation data should be analyzed directly, without first applying a normalization such as the Pearson correlation. In this communication, it is argued that there is nothing wrong with the widely adopted practice of normalizing cocitation data. One of the arguments put forward by Leydesdorff and Vaughan turns out to depend crucially on incorrect multidimensional scaling maps that are due to an error in the PROXSCAL program in SPSS.

Keywords: co-occurrence data, author cocitation analysis, normalization, Pearson correlation, multidimensional scaling, PROXSCAL

JEL Classification: M11, R4, M, C39

Suggested Citation

Waltman, Ludo and van Eck, Nees Jan, Some Comments on the Question Whether Co-Occurrence Data Should Be Normalized (25 2008 3,). ERIM Report Series Reference No. ERS-2008-014-LIS, Available at SSRN: https://ssrn.com/abstract=1117791

Ludo Waltman (Contact Author)

Erasmus University Rotterdam - Faculty of Economics and Business ( email )

P.O. Box 1738
3000 DR Rotterdam, NL 3062 PA
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Nees Jan Van Eck

Erasmus University Rotterdam - Erasmus School of Economics ( email )

P.O. Box 1738
3000 DR Rotterdam
Netherlands

HOME PAGE: http://people.few.eur.nl/nvaneck/

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