Gabon (Libreville 2)
Official title
Indice des prix à la consommation - Familles à revenu élevé
(Consumer Price Index - High Income Group).
Scope
The index is compiled monthly and covers African households with a
monthly income of more than 100,000 francs, CFA and non-African
households in the public and private sectors with a monthly income
of less than 100,000 francs, CFA during March and May 1969. The index
relates to Libreville.
Official base
June 1972 = 100.
Source of weights
The weights and selected items were derived from a household expenditure
survey conducted between March and May 1969 in Libreville among a sample
of 156 high-income group households, composed of 20 African households
whose head had a monthly income of more than 100,000 francs, CFA, and 59
non-African households in the public sector and 77 non-African
households in the private sector, whose head had a monthly income of
less than 100,000 francs, CFA, at the time of the survey.
Weights and composition
| Major groups
| Number of items
| Weights
| Approximate number of price quotations
|
| Food
| 84 | 511 | ...
|
| Household expenditure:
|
| Electricity, gas and water
| 3 | 56 | ...
|
| Domestic services
| 3 | 65 | ...
|
| Cleaning materials
| 7 | 21 | ...
|
| Household equipment and household linen
| 10 | 32 | ...
|
| Clothing and footwear
| 8 | 34 | ...
|
| Hygiene and health
| 10 | 35 | ...
|
| Transport and communication
| 10 | 123 | ...
|
| Miscellaneous
| 20 | 123 | ...
|
| Total
| 155 | 1000 | ...
|
Household consumption expenditure
Consumption expenditure for the purpose of the index comprises all
goods and services purchased for consumption by the index population.
It excludes income tax, gifts and charities, loans and repayments,
purchase of housing and rent.
Method of data collection
Prices of most items are collected by agents around the 25th of
each month from major retail outlets, one market and service
establishments in Libreville. Prices for fresh food items are
ascertained once a week.
The prices used in the index are the retail prices actually paid.
Housing
Rent is not included in the index.
Specification of varieties
The specifications are given in terms of the brand, make, quality and
unit.
Substitution, quality change, etc.
Not available.
Seasonal items
Seasonal fluctuations in prices are not taken into account in the
index.
Computation
The index is computed according to the Laspeyres formula as a
weighted arithmetic average with fixed base, using weights corresponding
to March-May 1969.
Organisation and publication
Présidence de la République, Direction générale de la statistique
et des études économiques:
Bulletin mensuel de statistique
(Libreville).
For further methodological details, see:
Ministère délégué à la Présidence de la République chargé du
plan, du développement et de l'aménagement du territoire,
Direction générale de la statistique et des études économiques:
Bulletin mensuel de statistique
(Libreville),
No. 166-167, Jan.-Feb. 1973.