Why is the Nature Index based on articles from 82 journals?

The researcher panels who selected the journals have aimed initially for fewer than 100 titles — enough to provide inclusivity of many disciplines but sufficiently selective to ensure that the journals truly reflect the upper tiers of research achievement as judged by peers. The 68 journals included in the first release of the Nature Index represent less than 1% of the journals covering natural sciences in the Web of Science (Clarivate Analytics) but account for close to 30% of total citations to natural science journals. The composition and total number of journals included in the Nature Index is reviewed on a regular basis, with the current revised list of 82 journals released in June 2018. The revision and expansion of the Nature Index journals encompasses a number of changes since the original release, including better representation of each of subjects covered in the nature index (4-5% of articles in the Web of Science) and the inclusion of new journals that were not available when the index was first released.

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