ar-index
The ar-index (Jin 2007; Jin et al. 2007) is an adaptation of the R-index which includes time. Rather than being the square-root of the total citations within the core, it is the square-root of the citations per year within the core,
$$ar=\sqrt{\sum\limits_{i=1}^{h}{\frac{C_i}{Y-Y_i+1}}},$$where Y is the current year.
History
| Year | ar |
|---|---|
| 1997 | 1.0000 |
| 1998 | 2.7386 |
| 1999 | 3.6286 |
| 2000 | 4.4064 |
| 2001 | 5.5498 |
| 2002 | 6.9594 |
| 2003 | 8.9569 |
| 2004 | 10.9832 |
| 2005 | 12.7401 |
| 2006 | 14.3692 |
| 2007 | 15.5556 |
| 2008 | 16.7810 |
| 2009 | 17.8824 |
| 2010 | 18.5128 |
| 2011 | 23.6524 |
| 2012 | 23.7461 |
| 2013 | 24.0978 |
| 2014 | 24.3261 |
| 2015 | 24.6452 |
| 2016 | 24.7084 |
| 2017 | 24.7943 |
| 2018 | 24.7646 |
| 2019 | 24.7034 |
| 2020 | 24.9060 |
| 2021 | 25.0197 |
| 2022 | 25.1448 |
| 2023 | 25.1598 |
| 2024 | 25.0940 |
| 2025 | 24.6122 |
References
- Jin, B. (2007) The ar-index: Complementing the h-index. ISSI Newsletter 3(1):6.
- Jin, B., L. Liang, R. Rousseau, and L. Egghe (2007) The R- and AR-indices: Complementing the h-index. Chinese Science Bulletin 52(6):855–863.