The nuclear network: multiplex network analysis for interconnected systems

Applied Network Science

Table 1 Average percentile rank of each state’s proliferation metric grouped by proliferation stage

Proliferation Stage	Average Rank	Standard Deviation	Count
No Activity (0)	0.45	0.27	4518
Explore (1)	0.65	0.23	204
Pursue (2)	0.86	0.11	174
Acquire (3)	0.93	0.10	216

States with and without nuclear weapons (Stage=3 and 0, respectively) are differentiated with the statistical significance of one standard deviation. The count gives the number of country-year instances used to derive each average rank