← Back to introduction

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

Yearhdyn
1997n/a
19984.4000
19997.2414
200011.9521
200115.5997
200221.7059
200331.2356
200440.1057
200552.2109
200665.0867
200777.1554
200888.3278
2009103.2281
2010114.6038
2011129.0467
2012143.9185
2013155.9314
2014165.0498
2015172.0641
2016176.3844
2017180.5379
2018182.3495
2019182.7041
2020183.2399
2021185.3754
2022187.1280
2023187.9943
2024184.0225

References