in most cases data on the structure of household consumption patterns for both foodstuffs and other goods and services are derived from national household budget surveys carried out in the s in order to carry out this calculation the indigence line is multiplied by one factor for urban areas and another for rural zones for the poverty estimates a factor of was used for urban zones and a factor of was used for rural areas the factors applied since vary depending on the differentials between trends in the prices for foodstuffe and for other goods and services