How did I get chosen for this survey?
When invited to participate in a survey, to represent a larger population group. Data collection can occur via a complete census, which involves every member, or through sampling, which selects a smaller, representative group.
Sampling allows statisticians to make accurate conclusions about the entire population efficiently, saving time and resources compared to a full census. While a census can provide comprehensive and accurate information, it is more costly and time-consuming compared to sampling.
Simple random sampling is the most straightforward technique, where everyone has an equal chance of being chosen. However, in many cases the population is divided into subgroups based on key characteristics (like age, sex, and location) which may influence how an individual responds to ensure the sample representativity by such characteristics. This method is known as stratified sampling.
After dividing the population into such groups, an independent random sample is drawn from each subgroup. Several factors can influence the number of units selected from each subgroup, such as the desired margin of error, known response rates, response distributions, and variability within the strata.
Samples are drawn from specific databases, technically known as ‘sampling frames’. Sampling frames are comprehensive lists of eligible units—such as individuals, households, or businesses—that include auxiliary information used for sample selection and survey conduction. These frames are maintained by specialised teams within the NSO and contain detailed data like identification details and economic information relevant to the survey population.
Efforts are made to coordinate sampling and minimise respondent burden by avoiding overlapping surveys. However, this can be complex and depends on the population size and characteristics.
Regular participation
Certain ongoing surveys required by EU regulations, such as the Statistics on Income and Living Conditions and the Labour Force Survey, are panel surveys, meaning the same households or individuals are contacted repeatedly over time to track changes and trends (e.g. to analyse long-term unemployment or poverty). If chosen for these surveys, the NSO will guide you on when you will be recontacted again to participate in the survey.
Can I Volunteer?
If you are interested in participating into our survey you can contact the NSO and express interest in supporting or participating in our work — especially for pilot studies, testing, or consultation exercises.
Why was I chosen?
If you have been contacted and you are unsure why you were selected, you can contact the NSO directly — we’re transparent about the process and will be happy to answer any queries you may have.
