Prime Minister John Key and Labour leader David Shearer have both voiced support for a four-year parliamentary term - but the change will require public buy-in to happen.
Mr Key said the length of the parliamentary term was one of the issues a Constitutional Review advisory panel was considering.
"My view has always been that we should have a fixed four-year term. I think it makes a lot more sense to know when the date is and it makes more sense to have four years."
Mr Shearer said he also believed the idea was worthy of consideration. "Three years is what we've always had, but in many ways it's a very short period of time. It's too long in Opposition, I have to say, but it's maybe too short in Government."
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