If David Shearer is not performing within two years he'll be gone, political commentator Dr Bryce Edwards says.
The Otago University lecturer said the decision to elect the one-term MP as the new Labour leader was "bold" and showed the party realise they needed to make significant changes following their poor performance on election day.
"He's pretty untested, unproven and he isn't very well known, so it is a huge risk they've taken. It is a bold decision they've made, so I'm impressed by them taking that risk.
"It's quite obvious that a big part of the reason that he won is simply by the fact that he is not David Cunliffe. That's a bit of a negative reason to be elected."
Dr Edwards does not believe the party will give Mr Shearer a long time to find his feet in the role, unlike Phil Goff who was given an entire term despite poor poll ratings.