Several bibliometric studies have shown that international or multicountry papers are generally more cited than domestic or
single country papers. Does this also hold for the most cited papers? In this study, the citation impact of domestic versus
international papers is analyzed by comparing the share of international papers among the hundred most cited papers in four
research specialities, from three universities, four cities and two countries. It is concluded that international papers are
not well represented among high impact papers in research specialities, but dominate highly cited papers from small countries,
and from cities and institutions within them. The share of international papers among highly cited papers is considerably
higher during 2001–2008 compared to earlier years for institutions, cities and countries, but somewhat less for two of the
research fields and slightly higher for the other two. Above all, domestic papers from the USA comprise about half of the
highly cited papers in the research specialities.
Comparing properties of citing and cited source items opens a wide variety of analytical possibilities. In a study of citations
among papers in the journal Scientometrics a number of analytical themes are identified. The analysis shows: the way in which a citation graph can be decomposed into
different subparts; country specific citation patterns; the effects of self-citations and domestic citations; the mapping
of cited author relationships using direct citation and co-citation links; and time slicing effects on impact ranking of countries
Based on a set of information science papers this study demonstrates that "all author" citationcounts should be preferred when visualizing the structure of research fields. "First author" citationstudies distort the picture in terms of most influential researchers, while the subfield structuretends to be just about the same for both methods.
The Swedish innovation system is analysed in terms of the interaction between academia, government and the private sector. For each of 21 Swedish regions we analyse the distribution of research activities, doctoral employment, and publication output, as well as the flow of doctoral graduates and the distribution of co-authorship links across regions and sectors. The three main urban regions have about 75 percent of all R&D activities and outputs. They also have a more balanced supply of academic, governmental and private research activities than the smaller regions, and the interactions among sectors within these regions are more intense. The inter-regional flow of PhDs is also to the advantage of the big regions. So far, decentralization of the academic sector does not seem to have had as similar decentralizing effect on private R&D. Unless this imbalance changes, smaller regions will continue to be net exporters of skill and knowledge to the big regions.
The mapping of author networks at academic departments is the focus of this study. Papers from two departments at two different universities, but within the same field of research, were analyzed in terms of co-authorship, direct and indirect citations among the authors. Considerable overlap was found between the co-authorship and the citation based networks. The paper also introduces the idea of socio-bibliometric maps that can be used to make social interpretations of bibliometric networks. The nodes of the networks were labeled by sex and seniority and supervisor-student links were also indicated. When reading the maps and tabulating the links it could be concluded that the two departmental networks were structured differently by sex and seniority.
Authors:Per Ahlgren, Cristian Colliander and Olle Persson
We compared three different bibliometric evaluation approaches: two citation-based approaches and one based on manual classification of publishing channels into quality levels. Publication data for two universities was used, and we worked with two levels of analysis: article and department. For the article level, we investigated the predictive power of field normalized citation rates and field normalized journal impact with respect to journal level. The results for the article level show that evaluation of journals based on citation impact correlate rather well with manual classification of journals into quality levels. However, the prediction from field normalized citation rates to journal level was only marginally better than random guessing. At the department level, we studied three different indicators in the context of research fund allocation within universities and the extent to which the three indicators produce different distributions of research funds. It turned out that the three distributions of relative indicator values were very similar, which in turn yields that the corresponding distributions of hypothetical research funds would be very similar.
Authors:Olle Persson, Wolfgang Glänzel and Rickard Danell
Several research studies and reports on national and European science and technology indicators have recently presented figures reflecting intensifying scientific collaboration and increasing citation impact in practically all science areas and at all levels of aggregation. The main objective of this paper is twofold, namely first to analyse if the number or weight of actors in scientific communication has increased, if patterns of documented scientific communication and collaboration have changed in the last two decades and if these tendencies have inflationary features. The second question is concerned with the role of scientific collaboration in this context. In particular, the question will be answered to what extent co-authorship and publication activity, on one hand, and co-authorship and citation impact, on the other hand, do interact. The answers found to these questions have strong implication for the application of bibliometric indicators in research evaluation, moreover, the construction of indicators applied to trend analyses and studies based on medium-term or long-term observations have to be reconsidered to guarantee the validity of conclusions drawn from bibliometric results.
Authors:Wolfgang Glänzel, Rickard Danell and Olle Persson
Recent studies have reported on a steady decline of Sweden's relative citation impact in almost all science fields, above
all in the life sciences. The authors attempt to shed light on the observed decline in Swedish neuroscience through a detailed
citation analysis at different level of aggregations. Thus national citation data are decomposed to the institutional, departmental
and individual level. Both, the decomposition of national science indicators and changing collaboration patterns in Swedish
neuroscience reveal interesting details on the 'anatomy' of a decline.
Authors:Patrick Glenisson, Wolfgang Glänzel and Olle Persson
Summary In the present study full-text analysis and traditional bibliometric methods are combined to improve the efficiency of the individual methods in the mapping of science. The methodology is applied to map research papers from a special issue of Scientometrics. The outcomes substantiate that such hybrid methodology can be applied to both research evaluation and information retrieval. The subject classification given by the guest-editors of the special issue is used for validation purposes. Because of the limited number of papers underlying the study the paper is considered a pilot study that will be extended in a later study on the basis of a larger corpus.