Karen Halligan is the CEO of OzTAM, the company that measures Australian television audiences. OzTAM is independent, but is owned by three fierce rivals: Tv networks Nine, Seven and Ten.
This week OzTAM changed the way audiences are measured in Australia, bringing it into an age of catch-up viewing and online streaming. Karen Halligan talks to Sean Aylmer about the changes, and why it matters to TV networks, advertisers and audiences.

Afternoon Report | ASX hits three month high
04:52

Inflation to set rates; Bluescope looks for buyers; the “pilot” scoring free flights
15:27

Q+A: The high stakes behind Rio Tinto & Glencore mega merger talks
11:05