Spatial typology by the Federal Statistical Office (FSO) of respondent's place of residence: Municipality typology 2012 in 25 categories ("Gemeindetypologie 2012 (25 Kategorien)")

Spatial typology by the Federal Statistical Office (FSO) of respondent's place of residence: City/rural typology 2012 ("Stadt/Land-Typologie 2012")

date and time when the respondent started to answer the questionnaire (only online respondents)

date and time when the respondent last accessed the questionnaire (only online respondents)

time in seconds it took the respondent to complete the whole questionnaire (only online respondents)

time in seconds the respondent spent on the survey introduction page (only online respondents)

respondent's year of birth (official cantonal register information)

number of persons living in respondent's household (official cantonal register information)

number of underaged persons living in respondent's household (official cantonal register information)

difference in years between the respondent's own statement about his/her year of birth and the official cantonal register information

whether or not the respondent received at least one COVID-19 vaccination

the weight assigned to the respondent as a result of the weighting by participation (using an iterative proportional fitting procedure)

the weight assigned to the respondent as a result of the weighting by all voting decisions in the current ballot_date (using an iterative proportional fitting procedure; only voters)

the weight assigned to the respondent as a result of the weighting by is_vaccinated_covid (using an iterative proportional fitting procedure; only voters)

respondent's age at the end of the year of the ballot_date (derived from year_of_birth_official if available, otherwise from year_of_birth)

respondent's age group (derived from age)

respondent's monthly gross equivalised income (OECD square root scale) based on average monthly gross household income

empirical quarter the respondent's monthly gross equivalised income belongs in