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The International Postal Network and Other Global Flows as Proxies for National Wellbeing

Fig 4

Matrix of the intensity of connections between countries based on the number of items exchanged (higher is darker); axes are ordered by the country’s unweighted postal degree (its number of postal partners); only countries with more than 120 postal partners appear for display purposes.

Fig 4

doi: https://doi.org/10.1371/journal.pone.0155976.g004