Changes

#[[Cockburn MacGarvie Muller (2010) - Patent Thickets Licensing And Innovative Performance]]

#[[Cockburn Macgarvie (2011) - Entry And Patenting In The Software Industry]]

#[[Cockburn Wagner (2007) - Patents And The Survival Of Internet Related Ipos]]

#[[Entezarkheir (2010) - Patent Thickets And Market Value An Empirical Analysis]]