Understanding Society User Support

Hi Amy,

there is to our knowledge no written statement why this occurs. There is sometimes a bit of a time gap between the household being issued to field and the interview with all the different members of the household; sometimes children have had their birthdays by the time the interviews with the adult household members take place (note that the date of the interview with youths is estimated from the other household members' personal interview dates).
The age, too, is sometimes reported with error in the survey database and/or household grid. E.g., the person's age may be an estimate, i.e., when he person providing the detail did not know the young person's exact date of birth, they get asked the question AGEIF. If they said 16, the young person would receive the adult interview and we would only know after the young person reported their exact DOB themselves, which may be at a later wave, that they were not yet 16. If you compare the variables DVAGE (computed during the interview) and AGE_DV (computed after the fieldwork) you will see that these differ from each other as we clean some inconsistencies in DVAGE as we identify them.

Best wishes,
Understanding Society User Support