Week 11 - Communities in Networks

Dad Joke

The guy who stole my diary died yesterday.

My thoughts are with his family.

Housekeeping

  • Make an appointment for Self Assessment Reflection review
  • Submit Exam Questions ASAP

Plan for today

  • Groups in networks review
  • Discussion questions
  • R

Community Detection Review

  • What is a component? (Hint: there’s often one “giant” component)
  • What is a clique?
  • What is the weakness of cliques as a way of identifying groups?
  • What is a k-plex? (Hint: related to cliques)
  • The goal of most community detection algorithms is high modularity. What does that mean?

Core and Periphery Review

  • Why do groups often have a core and a periphery?
  • Given some of the other theories we’ve talked about, how would you expect the periphery to differ from the core?
  • What role does the periphery have in protests (Barberá et al. reading)?
  • What is one way to identify who is in the core or periphery?

Coreness Example

Discussion Questions