degree of collaboration
The Degree of Collaboration index (Subramanyam 1983) is simply the proportion of a researcher's publications which are coauthored,
$$\text{DC}=1-\frac{f_1}{P},$$where f1 is the number of single-authored publications.
History
| Year | DC |
|---|---|
| 1997 | 0.6667 |
| 1998 | 0.6250 |
| 1999 | 0.6667 |
| 2000 | 0.6429 |
| 2001 | 0.6111 |
| 2002 | 0.6364 |
| 2003 | 0.6923 |
| 2004 | 0.6897 |
| 2005 | 0.6000 |
| 2006 | 0.6111 |
| 2007 | 0.6410 |
| 2008 | 0.6585 |
| 2009 | 0.6444 |
| 2010 | 0.6667 |
| 2011 | 0.6909 |
| 2012 | 0.6964 |
| 2013 | 0.7097 |
| 2014 | 0.6875 |
| 2015 | 0.6866 |
| 2016 | 0.6957 |
| 2017 | 0.7000 |
| 2018 | 0.7067 |
| 2019 | 0.6974 |
| 2020 | 0.6883 |
| 2021 | 0.6962 |
| 2022 | 0.7143 |
| 2023 | 0.7176 |
| 2024 | 0.7159 |
References
- Subramanyam, K. (1983) Bibliometric studies of research collaboration: A review. Journal of Information Science 6(1):33–38.