Table 1.

Descriptive statistics by subregions

	Mean	SD	N
Population (${\text{Pop}}_i$)	56,824	131,121	175
$log{\text{Pop}}_i$	4.57	0.33	175
Migration ($M_i$)	1,655	3,558	175
$log{M}_i$	3.06	0.31	175
N of OSN users (${\text{iWiW}}_i$)	18,909	61,606	175
Log (${\text{iWiW}}_i$)	4.00	0.40	175
Sum of external connections (${\text{SC}}_i^{\text{brid}}$)	1,685,807	4,549,794	175
$log{\text{SC}}_i^{\text{brid}}$	6.00	0.36	175
Sum of local connections (${\text{SC}}_i^{\text{loc}}$)	2,237,650	6,645,080	175
$log{\text{SC}}_i^{\text{loc}}$	6.07	0.43	175
Standardized clustering (${\text{SC}}_i^{\text{bond}}$)	24.21	41.01	175
$log{\text{SC}}_i^{\text{bond}}$	1.25	0.28	175

log transformations are 10-based