TABLE 3.

Changes in Friendships for Each Dyad by Period

	Tie Change				Jaccard Coefficient
	0 → 0	0 → 1	1 → 0	1 → 1
From t1 to t2	5927	253	128	172	0.311
From t2 to t3	5874	181	95	330	0.545

Jaccard Coefficient, measure of similarity in networks across time.