Domestic factors are largely driving the economy with the post-earthquake Canterbury rebuild still ramping up and strong population growth supporting an upswing in Auckland residential construction.
The building boom is creating jobs with employment up 3.5 per cent year on year, boosting incomes and confidence and supporting increased spending, according to Bloxham.
Concern by policymakers about the high Kiwi dollar and its impact on exporters was surprising, he said.
"Much of that data does not support these concerns. Growth is strong and broad-based. The exchange rate-sensitive exports, such as manufactured goods and tourism services, are performing well despite the high currency."
Bloxham admitted the strong currency was a key factor in low inflation below the bottom of the Reserve Bank's 1 to 3 per cent target band.
Inflation was expected to fall from the current 0.8 per cent for the December quarter towards zero for the year's first quarter thanks to low oil prices - good, not bad disinflation, he said. "With GDP and employment growth above trend, low inflation is a bonus, as it also helps improve living standards."
Bloxham forecasts domestic inflation will rise soon as the economy is growing strongly, and the petrol price impact will be out of the picture by early next year.