The Core Might Change Anyhow We Define It: The Instability of Key Actors in Longitudinal Social Network Data

Table 3

(a) Returning frequency of the opinion leaders by different centrality measures for advice-seeking (as) and friendship (fr). Observation data for 4 waves. (b) Returning frequency of the opinion leaders by different centrality measures for advice-seeking (as) and friendship (fr). Observation data for 5 waves.

Type	Centrality	1	2	3	4	5
(a)
as	iDg	62	16	11	3
as	pg	52	12	4	2
as	2Nbh	88	25	11	2
as	Core	135	105	104	118
as	eign	46	20	2	1
as	Bca	52	12	2	5
fr	iDg	44	13	4	0
fr	pg	26	9	0	0
fr	2Nbh	54	16	2	0
fr	Core	42	46	56	54
fr	eign	17	6	5	0
fr	cl	36	7	1	1
fr	btw	27	5	1	1
fr	Bca	20	6	2	2
as & fr	Bca	46	11	7	0
(b)
as	iDg	73	25	12	5	3
as	pg	49	18	6	2	1
as	2Nbh	96	23	18	6	2
as	Core	96	93	105	86	79
as	eign	63	18	4	1	0
as	Bca	59	19	4	2	2
fr	iDg	163	37	18	5	0
fr	pg	123	22	7	0	0
fr	2Nbh	230	83	27	4	1
fr	Core	190	170	127	174	138
fr	eign	128	16	7	1	0
fr	cl	148	36	6	1	0
fr	btw	117	21	8	1	0
fr	Bca	122	26	7	1	0
as & fr	Bca	70	20	5	0	0

iDg: in-degree, pg: PageRank, 2Nbh: two-hop neighbourhood, core: coreness, eign: eigenvector centrality, cl: closeness, btw: betweenness, and Bca: Borda count aggregation.