# Michael S. Rosenberg’s Laboratory

Computational Evolutionary Biology & Bioinformatics

E-mail: msr@asu.edu
← Back to introduction

## f-index (Franceschini & Maisano)

Franceschini and Maisano's f-index (Franceschini and Maisano 2010) is designed as a complement to the h-index. It is a measure of the time-width of impact. It is the range of time for publications with at least one citation and is calculated as

$$f=\max\left(Y_i|C_i>0\right) - \min\left(Y_i|C_i>0\right) + 1,$$

or the year of the most recent publication with at least one citation minus the year of the earliest publication with at least one citation (plus one to consider the time spent preparing the earliest publication). For most active researchers, this will likely be simply the number of years since they first published since it will most often be the difference in age between their first publication (which probably has at least one citation) and their most recent publication to get a single citation (probably published within the last year or two).

Yearf
19971
19982
19992
20004
20015
20026
20037
20048
20059
200610
200711
200811
200912
201014
201115
201215
201317
201418
201518
201619
201719

## References

• Franceschini, F., and D.A. Maisano (2010) Analysis of the Hirsch index's operational properties. European Journal of Operational Research 203:494–504.