Fig 6. Countries Normalised Strength correlation.

Left: Correlated countries - Two countries are connected with a dark grey link if the Pearson coefficient between their strengths time series is above $T_1^{+}=0.92$ if the coefficient is only above $T_0^{+}=0.823$ the link is light grey. Right: Anticorrelated countries - Two countries are connected in dark grey if their strengths time series have a Pearson coefficient below $T_1^{-}=-0.84$ if the coefficient is only below $T_0^{-}=-0.75$ the link is light grey. In both the size of of the nodes is proportional to the strength of the node (regarding light edges).