5 citations · 12 across the 4 of their papers we have counts for
4 papers
The Leiden Ranking 2011/2012: Data collection, indicators, and interpretation
Ludo Waltman, Clara Calero-Medina, Joost Kosten +7
The Leiden Ranking 2011/2012 is a ranking of universities based on bibliometric indicators of publication output, citation impact, and scientific collaboration. The ranking include…
Towards a new crown indicator: An empirical analysis
Ludo Waltman, Nees Jan van Eck, Thed N. van Leeuwen +2
We present an empirical comparison between two normalization mechanisms for citation-based indicators of research performance. These mechanisms aim to normalize citation counts for…
Rivals for the crown: Reply to Opthof and Leydesdorff
Anthony F. J. van Raan, Thed N. van Leeuwen, Martijn S. Visser +2
We reply to the criticism of Opthof and Leydesdorff [arXiv:1002.2769] on the way in which our institute applies journal and field normalizations to citation counts. We point out wh…
Towards a new crown indicator: Some theoretical considerations
Ludo Waltman, Nees Jan van Eck, Thed N. van Leeuwen +2
The crown indicator is a well-known bibliometric indicator of research performance developed by our institute. The indicator aims to normalize citation counts for differences among…