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) | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| # of Publications (fa) | 7 | 3 | 3 | 5 |
| Quotient (fa/a) | 7.00 | 1.50 | 1.00 | 1.25 |
The sum of the quotients is 10.75, which yields a collaborative index of 0.4028.
History
| Year | CC |
|---|---|
| 1997 | 0.4722 |
| 1998 | 0.4167 |
| 1999 | 0.4537 |
| 2000 | 0.4464 |
| 2001 | 0.4028 |
| 2002 | 0.4468 |
| 2003 | 0.4771 |
| 2004 | 0.4795 |
| 2005 | 0.4163 |
| 2006 | 0.4187 |
| 2007 | 0.4292 |
| 2008 | 0.4440 |
| 2009 | 0.4323 |
| 2010 | 0.4684 |
| 2011 | 0.4783 |
| 2012 | 0.4817 |
| 2013 | 0.5029 |
| 2014 | 0.4872 |
| 2015 | 0.4885 |
| 2016 | 0.4942 |
| 2017 | 0.4997 |
| 2018 | 0.5115 |
| 2019 | 0.5047 |
| 2020 | 0.4982 |
| 2021 | 0.5062 |
| 2022 | 0.5246 |
| 2023 | 0.5302 |
| 2024 | 0.5328 |
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.