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 M3//EN
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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20141007T135311Z
DTSTART:20141001T150000Z
DTEND:20141001T163000Z
SUMMARY:Mitchell Centre Seminar Series: Tom Snijders 
UID:{http://www.columbasystems.com/customers/uom/gpp/eventid/}lby-i07zzkw
 1-wo81jd
DESCRIPTION:The Wonders of Specification Possibilities \nof Stochastic Ac
 tor-Oriented Models for Network Dynamics\n\nThe Stochastic Actor-Oriente
 d Model for Network Dynamics (SAOM)\, as implemented in the RSiena packa
 ge\, has a wide array of so-called effects\, which is the name for the f
 unctions of the network and the covariates on which the network dynamics
  is supposed to depend. There are many possibilities which are rarely us
 ed. This presentation is about two of these: the possibility to differen
 tiate between effects determining creation of new ties\, and maintenance
  of existing ties (the “creation” and “endowment” effects)\; and effects
  depending on what happens at distance two from the focal actor.\nThe ba
 sic SAOM specification uses an “evaluation function” to determine the pr
 obability of tie changes. With this specification\, terminating a tie is
  just the opposite of creating it. When creation and/or endowment effect
 s are used this is not the case\, and effects may differ\, or the streng
 th (coefficients) of effects may differ depending on whether a tie is cr
 eated or terminated.\nHomophily\, i.e.\, the tendency that similar actor
 s have a greater probability of being tied\, is a well-known phenomenon 
 and is studied a lot in social network analysis. Theoretically\, this ex
 tends naturally to the expectation of similarity between actors who are 
 tied indirectly\, e.g.\, those who have a sociometric distance of two. I
 s there evidence for such indirect homophily\, over what may be expected
  as a direct consequence of regular homophily?\nThe presentation discuss
 es how these two possibilities may be investigated in medium-size networ
 ks using RSiena. This is exemplified by two well-known and high-quality 
 data sets: the MBA students (Torlò – Lomi) and the Glasgow school (Teena
 ge Friends and Lifestyle Study\, West – Michell – Pearson). \n
STATUS:TENTATIVE
TRANSP:TRANSPARENT
CLASS:PUBLIC
LOCATION:G6\, Humanities Bridgeford Street\, Manchester
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