Double effort = Double impact? A critical view at international co-authorship in chemistry

An attempt is made to find statistical evidences of the I elation between i nternational coauthorship and citation impact. It was found that internatio nal co-authorship. in average, results in publications with higher citation rates than purely domestic papers. No correlation has been found, however, between the strength of co-authorship links and the relative citation emin ence of the resulting publications. International co-authorship links in ch emistry, as represented by the well-known Salton's measure, displayed a cha racteristic pattern reflecting geopolitical, historical, linguistic, etc. r elations among countries. A new indicator, representing also the asymmetry of co-authorship links was used to reveal main "attractive" and "repulsive" centres of co-operation.