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Mapping the network of global science: comparing international co-authorships from 1990 to 2000
by Caroline S. Wagner, Loet Leydesdorff
International Journal of Technology and Globalisation (IJTG), Vol. 1, No. 2, 2005
Abstract: Science and technology has been shown to result from dynamic interactions occurring at many levels and across various sectors. This study maps and analyses the network operating at the global level. Using the Science Citation Index (CD-Rom version) for 1990 and 2000, the networks created by international co-authorships are revealed. We analyse the observed linkages at the global level and on regional bases. The architecture of the network is further explored using statistical methods and factor analysis to reveal intense relationships as well as the core members of a global network. Findings show that, in the ten years between 1990 and 2000, the global network has expanded to include more nations, but the structure of this network has become more pronounced. Regional networks show emerging hubs. However, in some cases, the regions have been disconnected from the global level. A core set of advanced industrial nations has expanded from six in 1990 to eight in 2000. Factor analysis suggests that various large countries compete with each other for partners in the global network.
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