Today on LXer I found an article about an academic interdisciplinary study on the economic / innovative impacts of FLOSS.
The article is: http://lxer.com/module/newswire/view/78650/index.html
The final draft of the study, done by an international consortium, led by the United Nations University / University of Maastricht's (NL,EU) department of innovation, is: http://ec.europa.eu/enterprise/ict/policy/doc/2006-11-20-flossimpact.pdf
Please note that, at least in some places, Linux is called correctly Gnu/Linux.
bye
--- Stefano Spinucci FSFE Fellow