OECD - Study on Participative Web: User-created content
The concept of the "participative web" is based on an Internet increasingly
influenced by intelligent web services that empower the user to contribute
to developing, rating, collaborating on and distributing Internet content
and customising Internet applications. This study describes the rapid growth
of "user-created content" (UCC), its increasing role in worldwide
communication and draws out implications for policy.
http://www.oecd.org/dataoecd/57/14/38393115.pdf