APPENDIX SEASONAL ADJUSTMENT OF THE CPI
SEASONALITY OF CPI EXPENDITURE CLASSES
1 The Annual Seasonal Re-analysis (ASR) reviews the seasonal adjustment of the CPI series in more detail than is possible in the quarterly processing cycle.
2 Following the 2016 ASR, 58 of the 87 expenditure classes are considered seasonal and will be seasonally adjusted for the Analytical series; 'All Groups CPI, seasonally adjusted' and 'Underlying trend series - Trimmed mean and Weighted median'. There has been no change to this set of indexes which are seasonally adjusted.
3 Seasonally adjusted index numbers can be found in 'Table 13. CPI: Group, Expenditure Class and Selected Analytical Series Index Numbers, Seasonally adjusted, Weighted Average of Eight Capital Cities' and combined seasonal adjustment factors can be found in 'Table 14. CPI: Expenditure Class, Combined seasonal adjustment factors, Weighted Average of Eight Capital Cities'. These tables can be downloaded from the 'Downloads' tab of this issue on the ABS website <https://www.abs.gov.au>.
4 The following series has had an adjustment introduced due to changes in seasonal pattern:
- Footwear for infants and children, from June quarter 2014.
5 The following series have had trend breaks introduced to reflect one off changes to price index levels:
- Electricity, from September quarter 2015.
- Gas and other household fuels, from September quarter 2015.
- Tertiary education, from March quarter 2016.
- Water and sewerage, from September quarter 2016.
6 Changes to the seasonally adjusted series do not affect the original CPI index series.
7 For more details on the seasonal adjustment of the CPI please refer to the Explanatory notes of this issue or the
Information Paper: Seasonal Adjustment of Consumer Price Indexes, 2011
(cat. no. 6401.0.55.003).
Table 1 - Seasonal adjustment of CPI expenditure classes |
|
| CPI expenditure classes | Seasonally adjusted prior to 2016 Annual Seasonal Reanalysis (ASR) | Seasonally adjusted following 2016 ASR |
|
| Bread | n | n |
| Cakes and biscuits | y | y |
| Breakfast cereals | y | y |
| Other cereal products(a) | y | y |
| Beef and veal | y | y |
| Pork | y | y |
| Lamb and goat | y | y |
| Poultry | n | n |
| Other meats | y | y |
| Fish and other seafood | y | y |
| Milk | n | n |
| Cheese | n | n |
| Ice cream and other dairy products | n | n |
| Fruit | y | y |
| Vegetables | y | y |
| Eggs | n | n |
| Jams, honey and spreads | n | n |
| Food additives and condiments | y | y |
| Oils and fats | n | n |
| Snacks and confectionery | y | y |
| Other food products n.e.c. | y | y |
| Coffee, tea and cocoa | n | n |
| Waters, soft drinks and juices | y | y |
| Restaurant meals | n | n |
| Take away and fast foods | y | y |
| Spirits | n | n |
| Wine(a) | n | n |
| Beer | n | n |
| Tobacco | y | y |
| Garments for men | y | y |
| Garments for women | y | y |
| Garments for infants and children | y | y |
| Footwear for men | n | n |
| Footwear for women | y | y |
| Footwear for infants and children | y | y |
| Accessories | y | y |
| Cleaning, repair and hire of clothing and footwear | n | n |
| Rents | y | y |
| New dwelling purchase by owner-occupiers | n | n |
| Maintenance and repair of the dwelling | y | y |
| Property rates and charges | y | y |
| Water and sewerage | y | y |
| Electricity | y | y |
| Gas and other household fuels | y | y |
| Furniture | y | y |
| Carpets and other floor coverings | y | y |
| Household textiles | y | y |
| Major household appliances | n | n |
| Small electric household appliances | y | y |
| Glassware, tableware and household utensils | y | y |
| Tools and equipment for house and garden | n | n |
| Cleaning and maintenance products | n | n |
| Personal care products(a) | y | y |
| Other non-durable household products | y | y |
| Child care | y | y |
| Hairdressing and personal grooming services | n | n |
| Other household services | n | n |
| Pharmaceutical products | y | y |
| Therapeutic appliances and equipment | n | n |
| Medical and hospital services | y | y |
| Dental services | y | y |
| Motor vehicles | n | n |
| Spare parts and accessories for motor vehicles(a) | n | n |
| Automotive fuel | n | n |
| Maintenance and repair of motor vehicles | n | n |
| Other services in respect of motor vehicles | y | y |
| Urban transport fares | y | y |
| Postal services | n | n |
| Telecommunication equipment and services | n | n |
| Audio, visual and computing equipment | n | n |
| Audio, visual and computing media and services | n | n |
| Books | y | y |
| Newspapers, magazines and stationery | y | y |
| Domestic holiday travel and accommodation | y | y |
| International holiday travel and accommodation | y | y |
| Equipment for sports, camping and open-air recreation | n | n |
| Games, toys and hobbies | y | y |
| Pets and related products(a) | y | y |
| Veterinary and other services for pets | y | y |
| Sports participation | y | y |
| Other recreational, sporting and cultural services | y | y |
| Preschool and primary education | y | y |
| Secondary education | y | y |
| Tertiary education | y | y |
| Insurance(a) | y | y |
| Deposit and loan facilities (direct charges) | n | n |
| Other financial services | n | n |
|
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