Economic impact of open source software on innovation and the competitiveness of the ICT sector the EU – it was published today at the European Commission web site.
You can download and read this quite useful report, 287 pages, prepared by the UNU-Merit in the Netherlands by clicking on this link (PDF file, 1.7Mb). UNU-Merit is part of the United Nations Univeristy, and is the Maastricht Economic and social Research and training centre on Innovation and Technology.
More information about it (in Bulgarian) can be found at portal.bg.