Consumer NZ says the government's review into supermarket pricing is vital to ensure Kiwis are getting a fair deal.

The Commerce Commission will investigate whether pricing is as competitive as it could be.

Consumer NZ CEO Jon Duffy says New Zealand's supermarket 'duopoly' makes it easy for prices to rise.   

"Groceries bill make up an essential part of households spend. It’s important to make sure we are being treated fairly."

Duffy says a supermarket code of conduct, similar to Australia's, could also be useful in New Zealand. 

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