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Nature 449, 403 (27 September 2007) | doi:10.1038/449403b; Published online 26 September 2007

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H-index: however ranked, citations need context

Michael C. Wendl1

  1. Washington University Medical School, 4444 Forest Park Boulevard, Box 8501, St Louis, Missouri 63108, USA

The h-index (the number n of a researcher's papers that have received at least n citations) may paint a more objective picture of productivity than some metrics, as your News story 'Achievement index climbs the ranks' (Nature 448, 737; 2007) points out. But for all such metrics, context is critical.

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