What proportion of excellent papers makes an institution one of the best worldwide? Specifying thresholds for the interpretation of the results of the SCImago institutions ranking and the leiden ranking
Bornmann L.,Max Planck Innovation |
De Moya Anegon F.,Institute Politicas y Bienes Publicos
Journal of the Association for Information Science and Technology | Year: 2014
University rankings generally present users with the problem of placing the results given for an institution in context. Only a comparison with the performance of all other institutions makes it possible to say exactly where an institution stands. In order to interpret the results of the SCImago Institutions Ranking (based on Scopus data) and the Leiden Ranking (based on Web of Science data), in this study we offer thresholds with which it is possible to assess whether an institution belongs to the top 1%, top 5%, top 10%, top 25%, or top 50% of institutions in the world. The thresholds are based on the excellence rate or PPtop 10%. Both indicators measure the proportion of an institution's publications which belong to the 10% most frequently cited publications and are the most important indicators for measuring institutional impact. For example, while an institution must achieve a value of 24.63% in the Leiden Ranking 2013 to be considered one of the top 1% of institutions worldwide, the SCImago Institutions Ranking requires 30.2%. © 2013 ASIS&T.
Bornmann L.,Max Planck Innovation |
Anegon F.D.M.,Institute Politicas y Bienes Publicos |
Mutz R.,ETH Zurich
Online Information Review | Year: 2014
Purpose - The web application presented in this paper allows for an analysis to reveal centres of excellence in different fields worldwide using publication and citation data. Only specific aspects of institutional performance are taken into account and other aspects such as teaching performance or societal impact of research are not considered. The purpose of this paper is to address these issues. Design/methodology/approach - Based on data gathered from Scopus, field-specific excellence can be identified in institutions where highly-cited papers have been frequently published. Findings - The web application (www.excellencemapping.net) combines both a list of institutions ordered by different indicator values and a map with circles visualising indicator values for geocoded institutions. Originality/value - Compared to the mapping and ranking approaches introduced hitherto, our underlying statistics (multi-level models) are analytically oriented by allowing the estimation of values for the number of excellent papers for an institution which are statistically more appropriate than the observed values; the calculation of confidence intervals as measures of accuracy for the institutional citation impact; the comparison of a single institution with an "average" institution in a subject area: and the direct comparison of at least two institutions. Copyright © 2014 Emerald Group Publishing Limited. All rights reserved.
Maeseele P.,University of Antwerp |
Hendrickx K.,University of Liege |
Pavone V.,Institute Politicas y Bienes Publicos |
Hoyweghen I.V.,Catholic University of Leuven
Croatian Medical Journal | Year: 2013
This article explores the merits of foregrounding the dichotomy of politicization vs de-politicization for our understanding of bio-objects in order to study their production,circulation, and governance in European societies.By asking how bio-objects are configured in science, policy, public,and media discourses and practices,we focus on the role ofsocio-technical configurations in generating political relations. The bio-object thereby serves as an entry point to approach and conceptualize"the political"in an innovative way.Drawing from our previous work, which uses the concepts of de-politicization and (re-)politicization, this paper puts forward a research agenda for studying the political relations generated by specific socio-technical configurations of bio-objects.
Leydesdorff L.,University of Amsterdam |
De Moya-Anegon F.,Institute Politicas y Bienes Publicos |
Guerrero-Bote V.P.,University of Extremadura
Journal of the Association for Information Science and Technology | Year: 2015
Using Scopus data, we construct a global map of science based on aggregated journal-journal citations from 1996-2012 (N of journals = 20,554). This base map enables users to overlay downloads from Scopus interactively. Using a single year (e.g., 2012), results can be compared with mappings based on the Journal Citation Reports at the Web of Science (N = 10,936). The Scopus maps are more detailed at both the local and global levels because of their greater coverage, including, for example, the arts and humanities. The base maps can be interactively overlaid with journal distributions in sets downloaded from Scopus, for example, for the purpose of portfolio analysis. Rao-Stirling diversity can be used as a measure of interdisciplinarity in the sets under study. Maps at the global and the local level, however, can be very different because of the different levels of aggregation involved. Two journals, for example, can both belong to the humanities in the global map, but participate in different specialty structures locally. The base map and interactive tools are available online (with instructions) at http://www.leydesdorff.net/scopus-ovl. © 2014 ASIS&T.
Del Rio P.,Institute Politicas y Bienes Publicos
Energy Policy | Year: 2010
CO2 emissions reduction, renewable energy deployment and energy efficiency are three main energy/ environmental goals, particularly in Europe. Their relevance has led to the implementation of support schemes in these realms. Their coexistence may lead to overlaps, synergies and conflicts between them. The aim of this paper is to analyse the interactions between energy efficiency measures and renewable energy promotion, whereas previous analyses have focused on the interactions between emissions trading schemes (ETS) and energy efficiency measures and ETS and renewable energy promotion schemes. Furthermore, the analysis in this paper transcends the "certificate" debate (i.e., tradable green and white certificates) and considers other instruments, particularly feed-in tariffs for renewable electricity. The goal is to identify positive and negative interactions between energy efficiency and renewable electricity promotion and to assess whether the choice of specific instruments and design elements within those instruments affects the results of the interactions. © 2010 Elsevier Ltd.