Very interesting reading.
"Hal Varian and Carl Shapiro, two economics professors from the University of California at Berkeley, have written a research paper describing some of the economic issues surrounding open source and open standards software and its adoption by the public sector."
Seen on: http://linuxtoday.com/news_story.php3?ltsn=2004-06-11-031-26-NW-MR-PB
Or, download the (small) report file from: http://www.sims.berkeley.edu/~hal/Papers/2004/linux-adoption-in-the-public-sector.pdf
J. Antas