Science Mapping

Bornmann, Lutz lutz.bornmann at GV.MPG.DE
Thu Dec 6 06:48:58 EST 2012

Ranking and mapping of universities and research-focused institutions
worldwide based on highly-cited papers: A visualization of results from
multi-level models


Lutz Bornmann <> ,
Moritz Stefaner <> ,
Felix de Moya Anegón <>
, Rüdiger Mutz <> 


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. Based on data gathered from Scopus,
field-specific excellence can be identified in institutions where
highly-cited papers have been frequently published. The web application
combines both a list of institutions ordered by different indicator values
and a map with circles visualizing indicator values for geocoded
institutions. Compared to the mapping and ranking approaches introduced
hitherto, our underlying statistics (multi-level models) are analytically
oriented by allowing (1) the estimation of values for the number of excellent
papers for an institution which are statistically more appropriate than the
observed values; (2) the calculation of confidence intervals as measures of
accuracy for the institutional citation impact; (3) the comparison of a
single institution with an "average" institution in a subject area, and (4)
the direct comparison of at least two institutions.




Dr. Dr. habil. Lutz Bornmann

Division for Science and Innovation Studies

Administrative Headquarters of the Max Planck Society

Hofgartenstr. 8

80539 Munich

Tel.: +49 89 2108 1265

Mobil: +49 170 9183667

Email: bornmann at <mailto:bornmann at> 

WWW: <> 



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