Who Will Own Your Next Good Idea?
http://www.stayfreemagazine.org/ml/readings/who_will_own.pdf

Hart, Hillary
Atlantic Monthly
1998

Abstract:

According to the International Intellectual Property Alliance, a trade group representing film studios, book publishers, and the like. Last year, the alliance says, copyrighted material contributed more than $400 billion to the national economy and was the country's singlemost important export. These figures may actually understate the value of copyright.