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We have preliminary findings about the fragmentation of the European network science field:
With Marco Scotti and Mariya Ivancheva we mapped the co-authorship
network of European network science. We included all scientists with a
European affiliation who presented a paper at the INSNA Sunbelt
conferences or the NetSci annual conferences between 2005 and 2008 - 532
scholars. We looked up the top 5 most cited publications of these
scholars, and included their co-authors in a dataset, that ultimately
contains 3543 persons authoring 1689 publications.
We simulated scenarios when European authors are free to choose any
co-author, from any country or field. The only contraint that we kept
is that the number of authors, the number of publications, and the
distribution of authors per publications needs to stay the same. In the one thousand simulations the average number of components was
139, with a range of 98 to 166. The observed co-authorship network has
240 components, a high number that is not likely to arise by chance. The
bottom panel shows the relative size of the largest component to the
size of the network. In a fragmented system the largest component does
not gather a large fraction of the network. In our simulations the
largest component on the average gathers 91.2% of all nodes, with a
range between 89.1% and 93.4%. The observed proportion of the largest
component is 18.6%, way smaller that we would expect in an "unbiased"
Does anyone have comparable data on the US networks field?
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