Definition: Household identification number
1. In the cross-sectional component, the household fixed identification number (ID) is a sequential number.
2. In the longitudinal component, the household identification number (ID) is composed of the household number and the split number. The household number is a sequential number. The split number for the first wave shall always take the value "00".
Where the household remains entire, it shall keep the household number and split number from one wave to the next.
In the case of a split-off, the initial household shall keep the household number and split number from one wave to the next. The other households, i.e. split-off households, shall keep the same household number, but shall be assigned the next available unique split number in sequence.
In the case of a fusion of two sample households, if the new household is still at a previous address, it shall retain the household number and split number of the household that was at that address in the previous wave. If the new household is at a new address, the household number and split number of the household of the sample person who now has the lowest person number in the "household register" shall be used.
Commission Regulation (EC) No 1981/2003 of 21 October 2003 implementing Regulation (EC) No 1177/2003 of the European Parliament and of the Council concerning Community statistics on income and living conditions (EU-SILC) as regards the fieldwork aspects and the imputation procedures