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

Table 5

The empirical mean of the Jaccard similarity values computed between the aggregated measure over both advice-seeking and friendship networks and the classical centrality measures.

Network type	iDg	pg	2Nbh	Core	eign	cl	btw	Bca
Advice-seeking	0.43	0.38	0.39	0.38	0.35	—	—	0.43
Friendship	0.47	0.43	0.4	0.39	0.48	0.46	0.42	0.55

The variance is between 0.0151 and 0.1081. iDg: in-degree, pg: PageRank, 2Nbh: two-hop neighbourhood, Core: coreness, eign: eigenvector centrality, cl: closeness, btw: betweenness, and Bca: Borda count aggregation.