Indonesia
Official title
Combined Consumer Price Index of 27 capital cities of provinces.
Scope
The index is computed monthly and covers private households
in the urban areas of 27 capital cities of provinces.
Official base
April 1988-March 1989 = 100.
Source of weights
The weights and selected items were derived from a cost-of-living survey
conducted from July 1988 to June 1989 in 27 capital cities of provinces,
covering a sample of 35,000 private households. Excluded from the
survey were single-person households, those with more than 10 members,
institutional households and illiterate households.
Weights and composition
Not available.
Household consumption expenditure
The consumption approach was used for food, beverages, tobacco
and services and the delivery approach for calculating
expenditure for all semi-durable and durable goods.
Imputed rent for owner-occupied and rent-free houses was
calculated by applying the rent tariff applicable at that time.
The amount imputed was taken as income to the household as well
as expenditure. If the
household occupied an official (company) house with rent less
than the market value of rent, the amount of rent difference was
taken as imputed income and the market value of the rent as
expenditures. In addition, goods received free of charge and the
goods purchased at low prices were valued at market price and
classified as expenditure for these goods. The
difference between the market values and low prices were included as
household income.
The credit purchase of goods and services consumed during the
reference period was classified as consumption expenditure on the
goods and services concerned, and also as imputed income.
Advance payments and instalments paid during the
reference period were classified as non-consumption expenditure.
Non-consumption expenditure and other payments cover:
income tax, vehicle taxes/ownership transfer costs, taxes on land and
buildings, property tax, and radio and television contributions;
savings, insurance premium payments, debts payment, interest
payments, advance payments for goods purchase, loans to other
parties, purchases of immovable goods (land, houses) including
major repairs, the cost of parties, cost of religious or traditional
events, money lost, etc.
Method of data collection
Prices are collected by central and local statistical agents from
selected retail shops and establishments. Prices are collected each
week, month or quarter.
The pricing day is Tuesday for weekly collection, the 15th of the
month for monthly collection and the 10th to the 20th for quarterly
collection. Data for electricity, gas, water and communications are
obtained from the official tariffs.
The prices used to calculate the index are the retail prices actually
paid by consumers.
Housing
Rent quotations are obtained in March and September each year from 16
types of dwellings, according to the condition of the building and its
facilities. Owner-occupied housing was included in the calculation of
the weights, but in the index the price changes are calculated from
changes in the cost of housing materials and of wages of housing
builders.
Specification of varieties
Detailed specifications are provided for each item included in
the index, describing the variety, quality and
brand.
Substitution, quality change, etc.
If there is a quality change for an item, the new quality is
introduced only when prices are available for both the current and
previous periods.
Seasonal items
There is no change of season, so all items are available the
whole year round.
Computation
The index is computed according to the Laspeyres formula as a
weighted arithmetic average with fixed base, using weights
corresponding to the base period. The price relative for each
item is computed by dividing the average price for the current
period by the average price for the previous period. Average
prices are simple arithmetic averages.
The combined indices are obtained by computing weighted price
indices for each sub-group, major group and all items.
The index is an aggregation of the series for the different province
capitals. The national index is calculated from the city series, using
the number of households in the urban areas of each city as weights.
Other information
Separate indices are also computed and published for the 27 provincial
capital cities.
Organisation and publication
Central Bureau of Statistics: Monthly Statistical Bulletin
(Jakarta).