I have already commented on the size of the Facebook "nation." Now it turns out that a Facebook intern has assembled Facebook data to find the linkages between Facebook friends. The result is an amazing map of the world according to Facebook. The linkages clearly define most of the heavily populated areas of the world. China is dark because of its censorship, and sub-Saharan Africa looks sparse because it is not yet well connected to the internet. With the exception of China, this map is amazingly like the NOAA map of nighttime lights--both of them showing where there are people with enough money to have electricity and an internet presence.
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