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Back in 1991, the sociologist Scott Feld made a surprising discovery while studying the properties of social networks. Feld calculated the average number of friends that a person in the network has and compared this to the average number of friends that these friends had.
Against all expectations it turned out that the second number is always bigger than the first. Or in other words, your friends have more friends than you do.
http://www.technologyreview.com/view/523...n-you-are/