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Complex Network Analysis in Python by Dmitry Zinoviev

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Distinguish Strong and Weak Ties

Hardcore social network researchers call social network graph edges “ties.” In this section, I will sometimes refer to edges as ties—mostly out of respect to Mark Granovetter who introduced [Gra73] and elaborated [Gra83] the concept of weak and strong ties and later showed that weak ties are “strong.” In a sense, he was the first social researcher to consider weighted social networks.

Granovetter did not propose a mechanism for quantifying the strength of a tie, but offered four criteria to consider:

  • The amount of time spent in the tie
  • Emotional intensity
  • Intimacy (mutual trust)
  • Reciprocity

You may be able to evaluate the first and the last criteria, but the middle two require looking into the contents of the ...

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