# Michael S. Rosenberg’s Laboratory

Computational Evolutionary Biology & Bioinformatics

E-mail: msr@asu.edu
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## w-index (Wu)

Wu's w-index (Wu 2010) is very similar to the h-index, but defines a stricter core by requiring that each of the w publications have at least 10w citations.

$$w=\underset{i}{\max}\left(i \leq 10C_i\right)$$

One can view this graphically as identical to the h-index, except the threshold line has a slope of 10 rather than 1.

### Example

Publications are ordered by number of citations, from highest to lowest.

 Citations (Ci) 10×Rank (10i) Rank (i) 42 36 14 11 9 9 3 2 2 2 1 1 1 0 0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 w = 2

The largest rank where 10iCi is 2.

Yearw
19970
19980
19991
20001
20012
20022
20033
20043
20054
20066
20077
20087
20097
20108
20118
20129
201310
201411
201512
201612
201712

## References

• Wu, Q. (2010) The w-index: A measure to assess scientific impact by focusing on widely cited papers. Journal of the American Society for Information Science and Technology 61(3):609–614.