Social Networks
Friendship Paradox
Friendship Paradox
Friendship Paradox
Friendship Paradox
Preferential Attachment
Preferential Attachment
People with friends can more easily make friends
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Preferential Attachment
People with friends can more easily make friends
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Small World Experiment
Small World Experiment
296 Letters sent, only 64 arrived
Average number of connections was 5/6
Allen Goldman
Allen Goldman
Richard Feynman
Allen Goldman
Richard Feynman
Albert Einstein
John von Neumann
Robert Oppenheimer
2nd most followed account
Dunbar limit
How many interpersonal relationship can you have?
“The number of people you would not feel uncomfortable about joining, uninvited, at a chance meeting at a bar”
Dunbar limit
How many interpersonal relationship can you have?
“The number of people you would not feel uncomfortable about joining, uninvited, at a chance meeting at a bar”
Military Units
Dunbar limit
How many interpersonal relationship can you have?
“The number of people you would not feel uncomfortable about joining, uninvited, at a chance meeting at a bar”
Military Units
Estimates of neolithic village size: 150-200
Dunbar limit
How many interpersonal relationship can you have?
“The number of people you would not feel uncomfortable about joining, uninvited, at a chance meeting at a bar”
Military Units
Estimates of neolithic village size: 150-200
Amish churches - 20-40 families
~150 if we assume 3 kids, ~240 at 6 kids
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