Consumers Price Index

CPI is the quarterly measure of the changes to the prices of consumer items purchased by households, which gives a measure of inflation.

Consumers Price Index

Consumers Price Index - December quarter 2016

Release Date:12th January, 2017 

The Consumers Price Index (CPI) is an indicator or measure of prices changes. It is a fixed weighted average of price relatives and is computed using the Laspeyres price index formula. The current weighting pattern is based on the 2005 Household Expenditure Survey (HES), which was carried out in  2005/06. The HES information was used to select the 'basket', which is the commonly used term for the goods and services prices for the purpose of compiling the CPI.

Key facts

In the December 2016 quarter compared with the September 2016 quarter:

  • The consumer price index (CPI) decreased by 1.3 per cent
  • Transport group and Housing groups were the main contributors to the overall decrease with of 3.6 per cent and 3.3 per cent
  • Household Operations group prices rose 0.4 per cent and
  • Tobacco & Alcohol group up by 1.2 per cent
  • The underlying CPI fell by 0.7 per cent

Annual change

From the March 2016 quarter to the December 2016 quarter:

  • Average Annual Inflation for the year ended December 2016 fell by 0.33 per cent
  • Underlying CPI decreased by 0.3 per cent

The graph below shows changes in the major groups between September quarter 2016 to December quarter 2016.

CPI Graph1


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Information about CPI

The Consumer Price Index covers price changes of the basket of goods and services consumed by all households on Rarotonga (the main island).

The base year is 2006. Prices are collected for 205 items and from selected outlets around Rarotonga. Individual prices are combined using weights from the Household Expenditure Survey (HES) conducted in 2004/5. The HES information was used to select the basket of goods and services.

The inclusion of an underlying measure is a recent improvement and it is published at the same time as the CPI. The underlying measure excludes items of a highly volatile nature, items that are subject to policy changes.

It excludes all locally produced fruit, vegetables, meat and fish; international airfares; mortgage interest, government rent, postal and telecommunication charges, electricity charges; tobacco and alcohol; petrol and diesel.

The CPI is computed using the Laspeyres price index formula.

Downloads

pdfCPI: December quarter 2016

xlsxCPI: December quarter 2016 - Tables