Definitions
Article 2
For the purposes of this Regulation, the following definitions apply: (1) ‘fieldwork period’ means the period during which data is collected from respondents; (2) ‘reference period’ means the period to which a particular item of information relates; (3) ‘cross-sectional ’ means, in reference to data, those pertaining to a particular time or a given reference period; (4) ‘longitudinal’ means, in reference to data, those pertaining to given subsequent reference periods, observed yearly over a certain length of time with respect to the same observation unit; (5) ‘sample person’ means a member of a private household in the initial sample who is at least 16 years old at the end of the income reference period; (6) ‘sample household’ means a private household containing at least one sample person; (7) ‘selected respondent model’ means a mode of sampling based on individuals where the household to which the selected respondent belongs is the sample household and the selected respondent is the sample person; (8) ‘age’ of a person means the age in completed years at the end of income reference period, (9) ‘current household member’ means a member of a sample household at the time of data collection or compilation; (10) ‘co-resident’ means a current household member other than a sample person; (11) ‘household split’ means a situation where the sample persons living in a sample household at the time of wave x, live, at the time of wave x+1, in more than one private household within the national territory included in the target population; when a household split occurs, there will be only one initial household and one or more split-off households; (12) ‘initial household’ means a sample household which has undergone a household split and where any sample person who lived in that household at the time of wave x still lives at the same address at the time of wave x+1. If more than one sample person lived in the household at the time of the wave x and still live in that address at the time of the wave x+1 but in different households, the initial household is the household of the sample person still living at the initial address who has the lowest person number referred to in Annex III. If at the time of wave x+1 no sample person lives at the address of wave x, then the household of the sample person who had the lowest person number at the time of wave x is the initial household. If this person is no longer alive or no longer living in a private household within the national territory of the target population, the initial household is the household of the sample person with the next lowest person number. For the selected respondent model ‘initial household’ means the household of the selected respondent; (13) ‘split-off household’ means a household composed of members of the household that has undergone a household split, other than the initial household; (14) ‘fusion household’ means all sample persons from different sample households from the previous wave who join together to form a new household; (15) ‘modelling’ means generating information that is missing in the data set by making use of substantive relationships with information from outside the data set; (16) ‘collection unit’ means a household or person with certain characteristics to which or whom the information collected pertains; (17) ‘household respondent’ means the person from whom household-level information is obtained; (18) ‘rotational panel design’ means sample selection based on a fixed number of subsamples, each of which is representative of the target population at the time of its selection. Each year, one subsample rotates out and a new one is drawn as a substitute; (19) ‘wave’ means a year in which a subsample is participating in the survey; (20) ‘panel’ means a subsample observed over more than one year.