Perceived Social Network
Back in the 1950s a scientist name Stanley Milgram did a study where he sent a picture of a stock broker in Boston to a bunch of people in midwest and asked them to send the picture to someone in their network who was most likely to know the person. After collecting all the packets at the Bankers address, Milgram calculated the average number of hops from the person in the middle of the country to the Boston Banker was 6....