From: Sam Wormley on
Free Access to U.S. Research Papers Could Yield $1 Billion in Benefits
A new economic analysis finds that making taxpayer-funded scientific
papers freely available would yield more than $1 billion in benefits to
the U.S. economy over 30 years

http://news.sciencemag.org/scienceinsider/2010/08/free-access-to-us-research-papers.html?etoc