"The economy is settling into a growth pattern," institute chief executive Jean-Pierre de Raad says.
The March quarter survey shows economic recovery broadening beyond Auckland and Christchurch.
The economy surged in the December quarter to the best level since mid-2007.
"The recovery remains disappointing," principal economist NZIER Shamubeel Eaqub says. "Auckland is growing, but the post-quake surge in Canterbury is moderating and activity elsewhere is slowing."
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