In contrast to the above-mentioned studies, which emphasize the determination, identification, and analysis of scientists' research performance, Waldkirch et al. (2013) investigate the impact of citation metrics on the performance of German business administration researchers.
It can be hypothesized that with group authorship (and, therefore, a greater number of authors) the potential impact of self-citation may be greater, thereby at least partly accounting for the higher citation rate.
Of additional interest is the impact of self-citation (i.e. citing one's previous publication in a new publication).
These papers often have more impact in terms of citations, partly because many emanate from large and prestigious collaborations such as CERN.
For each paper (107,623 papers, 96.2% in English) quantitative and qualitative parameters (number of weighted papers, impact factor, number of citations, h-index, international collaborations, number of authors, and research centers) were analyzed.
The lack of agreement between SpringerNature and Couperin.org consortium is for the publisher a shortfall of over €5MM per year [$6.15 Million/USD]; inaccessibility of Springer journals in the French research units will have on these reviews a negative impact in terms of citations and articles submissions.
Assuming this observation is generalizable to the JCP, because supplements usually contain reviews and the parent journal usually contains a high proportion of research reports, the impact of author self-citation on differential citation rates between supplement and parent may be difficult to interpret.
The impact of a single citation is given higher value in subject areas where citations are less likely, and vice versa.
While we know that rendering one's research publicly visible via such traditional means as mass media stories has a salutary impact on the number of citations to that work in the peer-reviewed literature, we are just beginning to track the impact of scientists' "unmediated" signaling via tweets, blogs posts, etc.
Citation rank score: # of citations; impact; h-index; average.
