From: The block-constrained configuration model
dyad
activity
block id
block weight
sampling weight
1 – 1
a1
1
w1
a1w1
1 – 2
1 – 3
12
w12
a1w12
2 – 1
a2
a2w1
2 – 2
2 – 3
a2w12
3 – 1
a3
a3w12
3 – 2
3 – 3
2
w2
a3w2