Michael S. Rosenberg’s Laboratory

Computational Evolutionary Biology & Bioinformatics

E-mail: msr@asu.edu
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collaborative coefficient

The Collaborative Coefficient (Ajiferuke et al. 1988) is another measure of the degree of collaboration within a set of publications. It is calculated as:

$$\text{CC}=1-\frac{\sum\limits_{a=1}^{a_\max}{\frac{f_a}{a}}}{P},$$

where fa is the number of publications having a authors and amax is the largest number of authors for any publication.

Example

 # of Authors (a) # of Publications (fa) Quotient (fa/a) 1 2 3 4 5 3 3 5 5 1.5 1 1.25

The sum of the quotients is 8.75, which yields a collaborative index of 0.4531.

YearCC
19970.5667
19980.5556
19990.5833
20000.5208
20010.4531
20020.4915
20030.5169
20040.5150
20050.4554
20060.4567
20070.4650
20080.4791
20090.4632
20100.4977
20110.5059
20120.5089
20130.5284
20140.5111
20150.5195
20160.5247
20170.5349

References

• Ajiferuke, I., Q.L. Burrell, and J. Tague (1988) Collaborative coefficient: A single measure of the degree of collaboration in research. Scientometrics 14(5–6):421–433.