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Can anyone recommend any good scholarly articles (or applied  
resources for that matter) that deal with the topic of what is the  
"appropriate" level of network resilience / redundancy of contacts  
from a group or organizational level?

For example, presume that an organization wants to optimize  
collective social capital (from a network perspective - such as value  
and uniqueness of external contacts held by those in the network) yet  
at the same time ensure a healthy "memory" of core, useful external  
contacts that survives turnover of individual members.  It would seem  
to me that "redundancy" (e.g., resilience) competes with betweenness  
(a common network measure of individual social capital), so finding  
the right balance might be difficult to quantify and vary from  
situation to situation.

Is there any empirical observations or case studies for comparison?   
I know Valdis did a bunch of work with internet backbones and the  
like regarding resilience, but I was wondering if anyone recently  
published something from a social / organizational perspective.

Thanks in advance...

Guy Hagen, President
Innovation Insight, Inc.
27810 Sky Lake Circle
Wesley Chapel, FL 33543
http://innovationinsight.com/
813.997.2111




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