Hirsch proportionality constant
This metric (Hirsch 2005) describes a relationship between the h-index and the total citations and is defined as
$$a=\frac{C^P}{h^2}.$$History
| Year | a |
|---|---|
| 1997 | 2.0000 |
| 1998 | 1.6667 |
| 1999 | 4.8889 |
| 2000 | 3.3600 |
| 2001 | 4.0278 |
| 2002 | 5.2245 |
| 2003 | 3.9900 |
| 2004 | 4.4514 |
| 2005 | 4.2044 |
| 2006 | 5.3086 |
| 2007 | 4.9751 |
| 2008 | 5.1202 |
| 2009 | 4.7795 |
| 2010 | 5.3696 |
| 2011 | 5.1837 |
| 2012 | 4.6533 |
| 2013 | 5.0771 |
| 2014 | 5.3945 |
| 2015 | 5.6800 |
| 2016 | 6.2767 |
| 2017 | 6.0942 |
| 2018 | 6.5851 |
| 2019 | 7.0716 |
| 2020 | 7.1711 |
| 2021 | 7.2965 |
| 2022 | 7.0303 |
| 2023 | 7.0567 |
| 2024 | 7.4337 |
| 2025 | 7.1769 |
References
- Hirsch, J.E. (2005) An index to quantify an individual's scientific research output. Proceedings of the National Academy of Sciences USA 102(46):16569–16572.