[igraph] betweenness and node attributes

[Wincent]

Dear all, I use betweenness to get the betweenness value, and
would like to see what individual attributes may influence or "determine"
the betweenness centrality.

I think OLS regression can get the point estimates but the p-value
would be problematic. I wonder if there is existing function(s) for
such purpose?
Thank you very much in advance.

-- 
Wincent Rong-gui HUANG
Doctoral Candidate
Dept of Public and Social Administration
City University of Hong Kong
http://asrr.r-forge.r-project.org/rghuang.html