Table 1. 
A hypothetical but realistic scenario. Four journals, A, B, C, and D, have the same IF but different sizes, when they each publish a paper that brings them c = 100 citations. The IF gain spans four orders of magnitude—both in absolute, Δf(c), and relative, Δfr(c), terms—because it depends not only on the additional paper, but also on the size of each journal
JournalSize N1Citations C1Initial IF f1New paper cFinal IF f2Δf(c) f2 − f1Δfr(c) (f2 − f1)/f1
A 50 150 3 100 4.902 1.902 63.4% 
B 500 1,500 3 100 3.194 0.194 6.45% 
C 5,000 15,000 3 100 3.019 0.019 0.65% 
D 50,000 150,000 3 100 3.002 0.0019 0.06% 
JournalSize N1Citations C1Initial IF f1New paper cFinal IF f2Δf(c) f2 − f1Δfr(c) (f2 − f1)/f1
A 50 150 3 100 4.902 1.902 63.4% 
B 500 1,500 3 100 3.194 0.194 6.45% 
C 5,000 15,000 3 100 3.019 0.019 0.65% 
D 50,000 150,000 3 100 3.002 0.0019 0.06% 
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