. . . . . . . . . . . . . . . "The benefits and costs of copyright an economic perspective : discussion paper prepared for the Centre for Copyright Studies Ltd"@en . "The benefits and costs of copyright : an economic perspective"@en . . . "This paper was motivated by the concern about the economic issues in evaluating the efficacy of copyright law and finding an optimal balance between the interests of copyright owners, users and the public."@en . . "The benefits and costs of copyright : an economic perspective : discussion paper prepared for the Centre for Copyright Studies Ltd"@en . . .