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Dear Yansong:
Before you come into conclusions regarding centrality, you may use 
Faust, Katherine and John Skvoretz 2002 “Comparing networks across space 
and time, size and species.” Pages 267-299 in Sociological Methodology 
2002, volume 32 edited by Ross Stolzenberg. Cambridge, MA: Basil Blackwell.


Yansong Hu wrote:
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>
> Hi,
>
> I'm puzzled in my research. In my current project, I need to compare 
> two groups of different networks. In Group 1, there are 30 different 
> networks. In Group 2, 20 different networks. The average size of the 
> first group(nodes around 300) is larger than the second group(nodes 
> around 80). 
>  
> I calculated the values such as eigenvector and betweenness centrality 
> for both groups, and found that these values are consistently larger in 
> group 1 than in group 2. How can I interpret the results? Am I 
> justified to say that nodes in Group 1 are more central than in Group 
> 2?  Thanks.
>
> Jason
>
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