Market structure and performance in intellectual property: The case of copyright collectives

Copyright collectives are associations to whom authors transfer copyrights for purposes of exploitation. These collectives grant licenses for the use of works in their repertory, they negotiate and collect royalties which they distribute to their members and they take legal actions against those who infringe the copyrights to which they hold title. This paper investigates the consequences of the formation of collectives on the number of copyrighted works produced and circulation of these works in the framework of a model of joint production. Welfare issues are also addressed.