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

Table 4

Size statistics of the opinion leaders (top-1 influencers) for the centrality measures computed on the friendship networks (229 networks).

Centrality	Mean	Variance	No. of unique cases
In-degree	1.7162	1.2862	142
PageRank	1.0131	0.0129	226
Two-hop neighborhood	2.5764	4.7944	104
Coreness	12.2926	19.0541	0
Eigenvector	1.0087	0.0087	227
Closeness	1.3057	0.5092	192
Betweenness	1.0087	0.0087	227
Borda count aggregation	1.066	0.0699	215