This week on Fourth Estate we discuss Twitter's latest round of measures against abuse and trolling, broken business models in journalism and the transfer of power and influence from the press to social media, and the recently announced overhaul of the New York Times' copyediting systems.

With Peter Fray (UTS) and David Swann (The Australian). Hosted by Marcus Costello and Olivia Rosenman.

Fourth Estate is produced by 2SER 107.3 in Sydney and is broadcast across the Community Radio Network in Australia.