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This is a pretty thorny issue, and any sort of minimum is not
going to be the same for all quantities!
For example, you mentioned "centrality", and what is reasonable is going
to be different for different types of centralities. (I believe that
there is a recent article by T. Valente and coauthors--- if I recall
correctly, and forgive me if I am messing up the reference---that
discusses various centrality measures. I want to say that it appeared in
"Connections". I'm sure there are several other relevant articles as
Also, I'd in general be cautious about saying that there is _any_
minimum with which I'd be definitively happy. My preference on such
things is actually to see mathematically rigorous theorems that give guidance...
> Date: Thu, 6 May 2010 16:52:16 -0400
> From: Allan Clifton <[log in to unmask]>
> Subject: Minimum network size
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> Hello all- is there an accepted minimum/desirable network size required
> to get accurate measures of network variables like centrality, cliques,
> density, etc.? Although you could compute these measures in a network of
> 5 people, it seems like a less reliable value than you would get from a
> network of 100 (although that might just be my impression, generalizing
> from non-network statistical analyses). Any suggestions for literature
> on this topic would be appreciated.
> Many thanks,
> Allan Clifton
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