|Consumers price index (CPI)||Factor model||Sectoral factor model||Tradable inflation||Non-tradable inflation|
A price index measures the change in price of a fixed basket of goods and services between two time periods. This change in prices over time is often called inflation.
The price indexes published are the:
The CPI is published 12 working days after the end of the reference quarter.
The PPI is published approximately seven weeks after the end of the reference quarter.
The HPI is published around four months after the end of the reference quarter.
GDP is published around three months after the end of the reference quarter.
The Statistics Release Calendar provides a long-term plan of scheduled releases. It is updated and released on the first working day of the month.
View the Statistics Release Calendar.
The data has been reproduced with the permission of Statistics New Zealand and PropertyIQ.
Revisions are generally published when a table is next due to be updated and released. New or revised data is in bold font.
Data is sourced from Statistics New Zealand and PropertyIQ.
The factor model and sectoral factor model are produced by the Reserve Bank of New Zealand.
The CPI measures the changing price of a fixed basket of goods and services purchased by New Zealand households.
There are about 690 goods and services included in the basket. They are classified into 11 groups:
The CPI has an index reference period of the June 2006 quarter (=1000).
Tradable inflation covers goods and services that are imported or in competition with foreign goods, either in domestic or foreign markets.
Movements demonstrate how international price movements and exchange rates are affecting consumer prices.
Non-tradable inflation covers goods and services that do not face foreign competition e.g. government charges. It shows how domestic demand and supply conditions are affecting consumer prices.
The trimmed mean inflation excludes the influence of the largest price increases and decreases in the CPI. This is done at the item level of about 700 goods and services in the CPI basket (e.g. 91 octane petrol or strawberries).
The level of trim presented is 10 percent.
The weighted median inflation is the 50th percentile (by weight) of the distribution of price changes, when the price changes are ranked from highest to lowest.
The factor model is created by the Reserve Bank. It is a dynamic factor model that estimates the common component of inflation from all the CPI classes for which data is available. Ninety-six of the 105 classes currently in the CPI are included. The data excludes GST.
For more technical information see Giannone, D and T Matheson (2006)"A New Core Inflation Measure for New Zealand", Reserve Bank of New Zealand Discussion Paper 2006/10.
The sectoral factor model is created by the Reserve Bank. It estimates the common component of inflation in the CPI basket, the tradable basket, and the non-tradable basket, based upon separate factors for the tradable and non-tradable sectors. The data excludes GST.
For more technical information see:
The GDP deflator is an implicit price deflator (IPD) calculated by dividing real expenditure GDP by nominal expenditure GDP. It provides a broad measure of price change for total economic activity in New Zealand.
The HPI measures the movement in house prices for local council areas throughout New Zealand, providing an indicator of capital growth and how prices are trending in an area.
The inputs index measures the change in costs of production (excluding labour).
The outputs index measures the change in prices received by producers.
The PPI has an index reference period of the December 2010 quarter (=1000).
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