24 citations · 58 across the 15 of their papers we have counts for
7 papers · 1 filter
Which are the best cities for psychology research worldwide? A map visualizing city ratios of observed and expected numbers of highly-cited papers
Lutz Bornmann, Loet Leydesdorff, Günter Krampen
We present scientometric results about world-wide centers of excellence in psychology. Based on Web of Science data, domain-specific excellence can be identified for cities where h…
Mapping excellence in the geography of science: An approach based on Scopus data
Lutz Bornmann, Loet Leydesdorff, Christiane Walch-Solimena +1
As research becomes an ever more globalized activity, there is growing interest in national and international comparisons of standards and quality in different countries and region…
The Anna Karenina principle: A concept for the explanation of success in science
Lutz Bornmann, Werner Marx
The first sentence of Leo Tolstoy's novel Anna Karenina is: "Happy families are all alike; every unhappy family is unhappy in its own way." Here Tolstoy means that for a family to…
Integrated Impact Indicators (I3) compared with Impact Factors (IFs): An alternative research design with policy implications
Loet Leydesdorff, Lutz Bornmann
In bibliometrics, the association of "impact" with central-tendency statistics is mistaken. Impacts add up, and citation curves should therefore be integrated instead of averaged.…
Which cities produce excellent papers worldwide more than can be expected? A new mapping approach--using Google Maps--based on statistical significance testing
Lutz Bornmann, Loet Leydesdorff
The methods presented in this paper allow for a statistical analysis revealing centers of excellence around the world using programs that are freely available. Based on Web of Scie…
The detection of "hot regions" in the geography of science: A visualization approach by using density maps
Lutz Bornmann, Ludo Waltman
Spatial scientometrics has attracted a lot of attention in the very recent past. The visualization methods (density maps) presented in this paper allow for an analysis revealing re…