Google: The $4.6 Trillion Fair-Use Economy
Google Public Policy Blog: "The Economic Value of 'Fair Use'"
"The study -- which I encourage you to check out -- concludes that the "fair use economy" in 2006 accounted for $4.6 trillion in revenues (roughly one-sixth of total U.S. gross domestic product), employed more than 17 million people, and supported a payroll of $1.2 trillion (approximately one out of every eight workers in the US). It also generated $194 billion in exports and significant productivity growth. Using a methodology similar to a previous World Intellectual Property Organization guide, the results of the study demonstrate that fair use is an important economic driver in the digital age."