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Facebook’s study shows that even on an online social network that is supposed to cross the boundaries of geography and age, people tend to befriend others their own age, as well as people in the same country.
if you limit the analysis to a single country, the “four degrees of separation” theory shrinks even further, with most pairs of people being only separated by 3 degrees.
rgesthuizen on 2011-12-15A theory stemming from an experiment by social psychologist Stanley Milgram in the 1960s claims every living person is connected to any other through only six friends. According to a recent study, Facebook reduces the six degrees of separation to only four, meaning the world’s largest social network makes the world even smaller (figuratively).