Several research studies and reports on national and European science and technology indicators have recently presented figures reflecting intensifying scientific collaboration and increasing citation impact in practically all science areas and at all levels of aggregation. The main objective of this paper is twofold, namely first to analyse if the number or weight of actors in scientific communication has increased, if patterns of documented scientific communication and collaboration have changed in the last two decades and if these tendencies have inflationary features. The second question is concerned with the role of scientific collaboration in this context. In particular, the question will be answered to what extent co-authorship and publication activity, on one hand, and co-authorship and citation impact, on the other hand, do interact. The answers found to these questions have strong implication for the application of bibliometric indicators in research evaluation, moreover, the construction of indicators applied to trend analyses and studies based on medium-term or long-term observations have to be reconsidered to guarantee the validity of conclusions drawn from bibliometric results.
Braun, T. GlÄnzel, W. Schubert 2001 Publication and cooperation patterns of the authors of neuroscience journals Scientometrics 51 3 499–510.
Ding, Y. Foo, S. Chowdhury, G. 1999 A bibliometric analysis of collaboration in the field of information retrieval The International Information & Library Review 30 367–376.
GlÄnzel, W. De Lange, C. 1997 Modelling and measuring multilateral co-authorship in international scientific collaboration. Part II. A comparative study on the extent and change of international scientific collaboration links Scientometrics 40 3 605–626.
GlÄnzel, W. 2001 National characteristics in international scientific co-authorship Scientometrics 51 1 69–115.
GlÄnzel, W. 2002 Co-authorship patterns and trends in the sciences (1980–1998). A bibliometric study with implications for database indexing and search strategies Library Trends 50 3 461–473.
GÓmez, I. FernÁndez, M. T. MÉndez, A. 1995 Collaboration patterns of Spanish scientific publications in different research areas and disciplines Koenig, M. E. D. Bookstein, A. (eds.) Proceedings of the Biennial Conference of the International Society for Scientometrics and Informetrics Learned Inf. Medford, NJ 187–196.
REIST-2. 1997 The European Report on Science and Technology Indicators 1997 European Commission Brussels.
Van Raan, A. F. J. 1998 The influence of international collaboration on the impact of research results — Some simple mathematical considerations concerning the role of self-citations Scientometrics 42 3 423–428.