Table 4. Algorithms are compared against k-BC (k=3). Columns represent Spearman’s correlation, Euclidean distance, top-10 and top- n analysis respectively.

	ek-BC				ak-BC
	SP	Euc	10	n	SP	Euc	10	n
Twitter	1	1.82E-03	10.0/10	285.0/285	0.68	1.77E-03	10.0/10	285.0/285
Amazon	0.89	5.14E-06	9.4/10	521.0/578	0.07	6.81E-05	3.0/10	59.0/578
US patent	0.81	1.43E-06	9.0/10	1,149.8/1,942	0.02	5.91E-05	0.2/10	11.6/1942
Co-papers Citeseer	0.99	4.94E-05	10.0/10	650.2/658	0.27	3.47E-04	7.6/10	281.2/658
Co-papers DBLP	0.99	8.09E-05	10.0/10	729.4/735	0.31	4.72E-04	10.0/10	388.8/735
World wide web	0.91	2.63E-04	10.0/10	453.8/570	0.17	2.69E-04	9.6/10	336.2/570