6.3k citations · 9.2k across the 53 of their papers we have counts for
8 papers · 1 filter
Citation analysis may severely underestimate the impact of clinical research as compared to basic research
Nees Jan van Eck, Ludo Waltman, Anthony F. J. van Raan +2
Background: Citation analysis has become an important tool for research performance assessment in the medical sciences. However, different areas of medical research may have consid…
Source normalized indicators of citation impact: An overview of different approaches and an empirical comparison
Ludo Waltman, Nees Jan van Eck
Different scientific fields have different citation practices. Citation-based bibliometric indicators need to normalize for such differences between fields in order to allow for me…
Some modifications to the SNIP journal impact indicator
Ludo Waltman, Nees Jan van Eck, Thed N. van Leeuwen +1
The SNIP (source normalized impact per paper) indicator is an indicator of the citation impact of scientific journals. The indicator, introduced by Henk Moed in 2010, is included i…
An empirical analysis of the use of alphabetical authorship in scientific publishing
Ludo Waltman
There are different ways in which the authors of a scientific publication can determine the order in which their names are listed. Sometimes author names are simply listed alphabet…
On the calculation of percentile-based bibliometric indicators
Ludo Waltman, Michael Schreiber
A percentile-based bibliometric indicator is an indicator that values publications based on their position within the citation distribution of their field. The most straightforward…
Research collaboration and the expanding science grid: Measuring globalization processes worldwide
Robert J. W. Tijssen, Ludo Waltman, Nees Jan van Eck
This paper applies a new model and analytical tool to measure and study contemporary globalization processes in collaborative science - a world in which scientists, scholars, techn…