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Dear colleagues,


In reaction to a discussion on the Pajek list, I updated the routines bibcoupl.exe and bibjourn.exe (at http://www.leydesdorff.net/software/bibcoupl and http://www.leydesdorff.net/software/bibjourn , respectively) so that they are compatible with 64-bits operating systems and the output files are more general (in the Pajek format).


Bibcoupl.exe uses downloads from Thomson-Reuters’ “Web of Science” (Science Citation Index) and provides the input files for bibliographic coupling in Pajek and SPSS. Alternatively, co-citation analysis is possible by downloading from WoS the citing documents of the document set under study instead of this latter set itself.


Bibjourn.exe uses the journal names in the cited references of the download for mapping the knowledge base of a document set in terms of the journals cited. Technically, this is co-citation analysis of journals in the document set under study.


The routines provide the symmetrical co-occurrence matrix (coocc.dat), the asymmetrical cases/variables matrix (matrix.txt) in which the documents are the cases and the author names or journal names the variables, the spss-syntax for value labels (.sps), and the cosine-similarity matrix among the variables (cosine.dat) in the Pajek format.


Both routines have a systems limitation of 1023 variables. (Perhaps, this is no longer needed given the new compilers.) I’ll test that later and update if possible.


Best wishes,



** apologies for cross-postings.

Loet Leydesdorff

Professor, University of Amsterdam
Amsterdam School of Communications Research (ASCoR)

Kloveniersburgwal 48, 1012 CX Amsterdam
[log in to unmask] ; http://www.leydesdorff.net/
Honorary Professor, SPRU, University of Sussex; Visiting Professor, ISTIC, Beijing;


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