***** To join INSNA, visit http://www.insna.org ***** Hi Balasz! Very interesting - thanks for sharing this! It would be interesting to see the names of the persons. Beyond the obvious disciplinary boundaries: do you think the fragmentation is caused by nationality or seniority? Thanks, Philip On 10.12.2010 15:43, Balazs Vedres wrote: > ***** To join INSNA, visit http://www.insna.org ***** Dear all, > > We have preliminary findings about the fragmentation of the European > network science field: > > http://www.ceu.hu/cns/ans/euns > > 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" > system. > > Does anyone have comparable data on the US networks field? > > > Best > Balazs > _____________________________________________________________________ > SOCNET is a service of INSNA, the professional association for social > network researchers (http://www.insna.org). To unsubscribe, send an > email message to [log in to unmask] containing the line UNSUBSCRIBE > SOCNET in the body of the message. -- Philip Leifeld Max Planck Institute for | +49 (0) 1577 6830349 (mobile) Research on Collective Goods | +49 (0) 228 91416-73 (phone) MaxNetAging Doctoral Fellow | +49 (0) 228 91416-62 (fax) Kurt-Schumacher-Str. 10 | [log in to unmask] 53113 Bonn, Germany | http://www.philipleifeld.de _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.insna.org). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.