q2-index
The q2-index (Cabrerizo et al. 2010) is another metric designed to describe the h-index core. It is the geometric mean of both a quantitative (h-index) and a qualitative (m-index) measure of the core,
$$q^2=\sqrt{h\times m}.$$History
| Year | q2 |
|---|---|
| 1997 | 1.0000 |
| 1998 | 3.0000 |
| 1999 | 6.2450 |
| 2000 | 7.4162 |
| 2001 | 9.0000 |
| 2002 | 13.1149 |
| 2003 | 14.3178 |
| 2004 | 20.9284 |
| 2005 | 25.6905 |
| 2006 | 28.9828 |
| 2007 | 30.1993 |
| 2008 | 34.8999 |
| 2009 | 39.7995 |
| 2010 | 43.5890 |
| 2011 | 48.6415 |
| 2012 | 49.9600 |
| 2013 | 55.0999 |
| 2014 | 61.2944 |
| 2015 | 61.1964 |
| 2016 | 64.5368 |
| 2017 | 65.7951 |
| 2018 | 67.4611 |
| 2019 | 68.5493 |
| 2020 | 66.6783 |
| 2021 | 68.4105 |
| 2022 | 74.9466 |
| 2023 | 78.4219 |
| 2024 | 79.5047 |
| 2025 | 76.6420 |
References
- Cabrerizo, F.J., S. Alonso, E. Herrera-Viedma, and F. Herrera (2010) q2-index: quantiative and qualitative evaluation based on the number and impact of papers in the Hirsch core. Journal of Informetrics 4:23–28.