Spatial comparison survey on consumer price levels between territories

Sources
Dernière mise à jour le : 10/01/2013

Présentation de l'opération

Organisme producteur :

Insee. Direction des statistiques démographiques et sociales (DSDS)

Type d'opération :

Survey

Objectifs :

The spatial comparison survey on consumer price levels between territories serves to compare consumer price levels between territories, with products as identical as possible.

It is thus similar to a purchasing power parity (PPP) survey as per Eurostat (concerning household consumption).

Champ de l'opération

Champ géographique :

The survey is conducted on the Metropolitan territory (including Corsica) and these four overseas departments (DOM): Guadeloupe, Martinique, French Guiana and Reunion Island (at the moment of the survey, Mayotte was not yet a DOM).

Champ(s) statistique(s) couvert(s) :

The scope of the spatial comparison survey on consumer price levels between territories is all market goods and services consumed on the national territory by households.

Caractéristiques techniques

Unité statistique enquêtée :

Retail outlet

Périodicité de l'opération :

Occasional (March 2010); the survey may be repeated at intervals that are unlikely to be more regular than every five years.

Période et mode de collecte :

The price readings were collected by the network of INSEE price investigators throughout the month of March 2010.

In Metropolitan France, the consumer price index (CPI) data were used and further readings were taken both in Metropolitan France and in the DOM, on the one hand for the typical DOM products not surveyed in Metropolitan France (Charrette rum, anthurium....), and on the other for the products that were too heterogeneous to use CPI readings only.

In the DOM, the complementary survey was mainly used, with the readings taken for the monthly index limited to foodstuffs.

In Corsica, the complementary survey only was used.

Historique :

A comparison of prices between Metropolitan France and the overseas departments already took place in 1985 and1992. Similarly, a study with Corsica was conducted in 1995 and in 2006.

Plan de sondage :

All types of sales outlets were surveyed, according to their local representativeness. Between 4,000 and 7,000 price readings were taken in each of the overseas departments.

For each product, ten to twenty readings were taken, spread between one to four conurbations.

In Corsica, the number was raised to around 8,000, because it was necessary to add the field of food products as well as certain products not included in the comparison with the DOM, as they were absent or barely representative on these territories.

For mainland France, the number of readings taken as well as the CPI was in the order of 5,000, i.e. approximately a hundred products and around 50 readings per product, spread across 12 conurbations in provincial France and 4 departments of Ile de France.

As for the CPI, the sample was stratified according to three types of criteria: a geographical criterion (around 10 conurbations with more than 2,000 inhabitants in Metropolitan France, and the same in the DOM), the product type (400 product families called "varieties", with the variety as the basic level for collecting and calculating elementary price levels), and the sales outlet type (sample of outlets stratified by type of sale).

Along with these price readings in the field, there were the tariffs collected directly from private or public bodies such as EDF, telecoms operators, the National Sickness Insurance Fund (CNAM), and local public services.

For rents, the results of the INSEE housing survey will be used.

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