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Background variables 

Education level

The education level is used as a proxy indicator of the socio-economic status of the household and all its members. This indicator is based on the highest educational attainment level reached in the household, between the reference person and his/her partner. This level is then allocated to each member of the household, as they basically share the same socio-economic status. The indicator is based on the variable ET03 if the respondent (here, the reference person or partner) no longer follows daytime training, whereas it is based on variable ET02 if the respondent still currently follows daytime training. In this latter case, the "educational attainment level" is considered to be the level just below the current training level reported. The 4 levels are:

          • primary or no degree
        • secondary inferior
        • secondary superior
        • superior education

Income l

The income level is calculated based on the ‘total available income of the household’, for which an equivalent scale is applied (OECD, 1982). This allows comparing incomes of different households taking their size and composition into account. The different members of the household receive a specific weight: 1.0 for the first adult member of the household, 0.5 for each additional adult (18+ years) and 0.3 for each child (< 18 years). The total available income of the household is divided by the sum of the weights of all the members of the household to calculate the equivalent income. The 5 levels are:

    • < 750 euro
    • 750 - 1000 euro
    • 1000 - 1500 euro
    • 1500 - 2500 euro
    • > 2500 euro

Household composition

The household composition is based on the number of household members and the link between the household members and the reference person. Five categories are distinguished:
  • single (household of only one person)
  • one parent with child(ren) (single father or mother with child(ren))
  • couple without child(ren) (household with 2 partners only)
  • couple with child(ren) (2 partners with their child(ren))
  • other or unknown household composition (household that can not be categorised elsewhere)

It is emphasized that the definition of "a child" is ONLY based on the relationship with the reference person and not on the age. In some cases the link of a person with the reference person is unknown or suspected to be wrong. In such a case the household is added to the category "other or unknown".  

Urbanisation level

The information concerning the urbanisation level of the municipalities is not derived as such from the survey, but is added to the database. This variable is based on the report “La Belgique – Diversité territoriale” and is calculated in function of a number of morphological and functional characteristics of the municipalities. Two morphological criteria are used to classify the municipalities: the population density and the area of habitation. Three groups of municipalities are created based on these two criteria: municipalities with a high, medium or low degree of morphological urbanisation. Three criteria are used to describe the functional characteristics of the municipalities: the commercial function, the educative function and the employment rate. Based on this, the municipalities are classified as municipalities with a high, medium or low degree of functional urbanisation. A combination of these two characteristics allows to distinguish nine categories of municipalities. Besides, also central municipalities within the urbanisation area and clear rural areas are distinguished. Finally, these 11 categories are reduced to 3:

  • Urban
  • Sub-urban
  • Rural