Nicola Willis won't be drawn on the Reserve Bank's sudden change of tune on the Official Cash Rate. 

It's lowered the rate to 5.25% due to further signs of falling inflation. 

Economist Brad Olsen says the central bank needs to take accountability for radically changing its forecast without a radical change in circumstances. 

Nicola Willis told Ryan Bridge it isn't appropriate for her to get involved in the debate. 

She says the economy has slowed down and seeing interest rates come down is logical, but this is ultimately an independent decision for the Reserve Bank. 

LISTEN ABOVE 

• RB "not quite declaring victory on inflation" despite OCR cut - Liam Dann
• Markets 'relieved' following today's OCR cut - reports
• Jenee Tibshraeny: Was the Reserve Bank bluffing last time?
• Barry Soper: The Government's been on tenterhooks for this OCR cut
• 'Doesn't stack up': Former RBNZ economist rebukes claim justifying rate cut