Evolutionary Biological Data Science Laboratory

Year-based EM'-index by publication year citations

The Year-based EM′-index by publication year citations (Bihari and S. Tripathi 2018) is an adapation of the Year-based EM-index by publication year citations which includes all years rather than just those in the initial core. It is calculated just like the Year-based EM′-index by publication year citations, except with a EM′-index style modification.

Example

Years are ordered by number of citations, from highest to lowest. After each step, E_i is subtracted from the citations of the top E_i years. The yearly data is then resorted from high to low for each subsequent step.

Year (yi)	1997	2000	1998	1999	2001
Citations from Publication Year (Ci)	107	16	16	4	2
Rank (i)	1	2	3	4	5
				E1 = 4
Adjusted Citations (Ci)	103	12	12	2	0
New Rank (i)	1	2	3	4	5
			E2 = 3
Adjusted Citations (Ci)	100	9	9	2	0
New Rank (i)	1	2	3	4	5
			E3 = 3
Adjusted Citations (Ci)	97	6	6	2	0
New Rank (i)	1	2	3	4	5
			E4 = 3
Adjusted Citations (Ci)	94	3	3	2	0
New Rank (i)	1	2	3	4	5
			E5 = 3
Adjusted Citations (Ci)	91	2	0	0	0
New Rank (i)	1	2	3	4	5
		E6 = 2

The sum of the 6 E values is 18. Year-based EM′-index by publication year citations is the square-root of this sum, thus Ypc_EM′ = 4.2426.

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