Evolutionary Biological Data Science Laboratory

hpd-index

The hpd-index (Kosmulski 2009) is very similar to the h-index, except that it adjusts for the age of a publication. Rather than adjust per year, the metric is adjusted per decade. Thus if

$$cpd_i=\frac{10C_i}{Y-Y_i+1}$$

is the number of citations an article has per decade (where Y is the current year), then the hpd-index for an author is the largest rank for which hpd of their publications (ranked by cpd_i rather than C_i) have cpd ≥ hpd.

$$hpd=\underset{i}{\max}\left(i \leq cpd_i\right)$$

Example

Publications are ordered by adjusted number of citations, from highest to lowest.

Citations (Ci)	57	12	26	16	11	10	4	2	1	1	3	1	1	0	0	0	0	0
Age (Y − Yi + 1)	5	2	5	4	5	5	3	2	1	1	5	2	2	5	4	2	1	1
Adjusted Citations (cpdi)	114.00	60.00	52.00	40.00	22.00	20.00	13.33	10.00	10.00	10.00	6.00	5.00	5.00	0.00	0.00	0.00	0.00	0.00
Rank (i)	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
										hpd = 10

The largest rank where i ≤ cpd_i is 10.

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