dynamic h-type-index
The dynamic h-type index (Rousseau and Ye 2008) is a measure of both the size of the core as well as how the core is changing through time. The basic index is
$$h_{dyn}=R\times v_h,$$where R is the R-index and vh is a measure of the rate of change of the h-index through time. Rousseau and Ye (2008) suggest a number of ways to estimate vh, including that it be determined over a fixed time interval (e.g., 5 or 10 years) to make it more contemporary. They also suggest one use the rational h rather than h because its finer grained resolution will allow for better estimates of the rate of change of h.Here vh for a given year is estimated as the slope of the regression of the rational h-index against year for all data points up through that year.
History
Year | hdyn |
---|---|
1997 | n/a |
1998 | 4.4000 |
1999 | 7.2414 |
2000 | 11.9521 |
2001 | 15.5997 |
2002 | 21.7059 |
2003 | 31.2356 |
2004 | 40.1057 |
2005 | 52.2109 |
2006 | 65.0867 |
2007 | 77.1554 |
2008 | 88.3278 |
2009 | 103.2281 |
2010 | 114.6038 |
2011 | 129.0467 |
2012 | 143.9185 |
2013 | 155.9314 |
2014 | 165.0498 |
2015 | 172.0641 |
2016 | 176.3844 |
2017 | 180.5379 |
2018 | 182.3495 |
2019 | 182.7041 |
2020 | 183.2399 |
2021 | 185.3754 |
2022 | 187.1280 |
2023 | 187.9943 |
2024 | 184.0225 |
References
- Rousseau, R., and F.Y. Ye (2008) A proposal for a dynamic h-type index. Journal of the American Society for Information Science and Technology 59(11):1853–1855.