Clustering methodologies for identifying country core competencies

The technical structure of the Mexican science and technology literature was determined. A representative database of technical articles was extracted from the Science Citation Index for the year 2002, with each article Correspondence to: Ronald N. Kostoff, Office of Naval Research, 875 N. Randolph St, Arlington, VA 22217, USA. E-mail: [email protected] © 2007 Chartered Institute of Library and Information Professionals. All rights reserved. Not for commercial use or unauthorized distribution. at PENNSYLVANIA STATE UNIV on February 7, 2008 http://jis.sagepub.com Downloaded from Kostoff et al.: Clustering methodologies Journal of Information Science, 33 (1) 2007, pp. 21–40 © CILIP, DOI: 10.1177/0165551506067124 22 containing at least one author with a Mexican address. Many different manual and statistical clustering methods were used to identify the structure of the technical literature (especially the science and technology core competencies), and to evaluate the strengths and weaknesses of each technique. Each method is summarized, and its results presented.