Who is contributing to Open Source development?

[Gabor Szabo]

Hi,

do you know about any research on mapping the profile of
people who are contributing to an open source project?

I found an interesting report from 2008:
http://www.redhat.com/about/where-is-open-source/

but I'd like to know are things like correlation to
- country
- GDP / capita of the country
- freedom of speech in the country
- personal income
- living in urban or rural area
- ... (probably a few other things I cant think about now)


Anyone with better Google fu or who remembers
such research, please send me links.

regards
  Gabor

-- 
Gabor Szabo
http://szabgab.com/