Study title

Three-stage random stratified sample. The basic sample unit was the household. Sampling Frame: VAKUS Database which includes every household paying for electricity, gas, TV or radio (approx. 5.5 mil. households). The database is structured by regions (see the variable CZ_REG). Sampling Process: First stage: Selection of the 100 largest settlements (cities and towns) in the Czech Republic. For every city/town on the list a random sampling of addresses was made to select a number of people corresponding the share of the city/town population in the entire population of the Czech Republic. Second stage: Random selection of addresses from other settlements up to the total size of the sample. Third stage: a) Preparation of the list of all adult members (older than 18) in every contacted household. b) Selection of the respondent according the date of birth (the person with the closest birthday). If the selected respondent was not present, the interviewer had to make two other attempts to contact him/her. The replacement by the person with the second closest birthday was allowed only in case of a long term absence (one month and more) of the respondent first selected.

Survey data