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Citation share
Definition
Over a specified time period including year N of publication, the two-year citation share (expressed as a percentage) is defined as:
the number of citations received over a given time by all the publications of a given actor (institution, country, etc.) proportional to the number of citations over the same time period by all publications within the given frame of reference (world, for example).
Example
Table 1-3-50
France : scientific publications - world share of publications, two-year citation share and impact index at two years for all fields taken together over a long period (1993 to 2004).
- Click to enlarge (taken from the OST Report – 2006 edition)
Interpretation: In 2004 France's two-year world citation share was 4.4%. Its citation share followed a similar course to that of its world share of publication, except delayed in time; citation share progressed until 1997 and then loss ground slowly until 2001.