CSCI 3350: Social & Economic Networks How do behavior, opinion, - PDF document

2/27/2014 CSCI 3350: Social & Economic Networks How do behavior, opinion, technology, etc. propagate in a network? “Cascading Behavior in Networks” Reading: Ch 19 EK Mohammad T . Irfan 2/27/14 Midterm Exam 1  Thursday, March 6  45 minutes (followed by lecture)  Topics  The strength of weak ties – ch 3 of EK  Homophily – ch 4 of EK  Structural balance – ch 5 of EK  Diffusion (ongoing) – ch 19 and 21 of EK 1

2/27/2014 Previously  Simple model of individual behavior based on threshold  Diffusion  Homphily hinders diffusion  Weak ties do not help Today  Clustering vs. diffusion  Collective action (& collective behavior)  More general model of diffusion  Thresholds are different  Issue of initial adopters  Even more general model of diffusion  Threshold & influence are different 2

2/27/2014 From crowd setting To behavioral setting  Both positive and negative influence  Varying threshold levels 3

2/27/2014 Readings  Ch 19 of EK  Granovetter’s threshold model  http://vserver1.cscs.lsa.umich.edu/~spage/ONLINEC OURSE/R2Granovetter.pdf  Collective action  My dissertation  http://www.bowdoin.edu/~mirfan/papers/Mohammad_ Tanvir_Irfan_Dissertation.pdf  Section 2.1.1 and Appendix 2A  External links  Gladwell’s view: http://www.youtube.com/watch?v=YFbkVL1X9M8  Watts’ view: http://www.fastcompany.com/641124/tipping-point- toast 4