respondent's questionnaire number (every (partially) completed questionnaire gets a sequential number assigned starting from 1)

online first, print only later with reminder letter

the way the questionnaire was provisioned to the respondent

dummy value indicating whether or not the respondent received a postal reminder

respondent's year of birth (own statement)

how attached the respondent feels to the canton of Aargau

respondent's participation status at the current ballot (blank votes count as 'participated')

whether or not indecision was a reason for the respondent to abstain from voting (only non-voters)

whether or not indecision was a reason for the respondent to abstain from voting on cantonal matters (only cantonal non-participating online respondents)

whether or not disinterest in politics was a reason for the respondent to abstain from voting (only non-voters)

whether or not disinterest in politics was a reason for the respondent to abstain from voting on cantonal matters (only cantonal non-participating online respondents)

whether or not the election being too complicated was a reason for the respondent to abstain from voting (only non-voters)

whether or not the election being too complicated was a reason for the respondent to abstain from voting on cantonal matters (only cantonal non-participating online respondents)

whether or not being unable to attend was a reason for the respondent to abstain from voting (only non-voters)

whether or not being unable to attend was a reason for the respondent to abstain from voting on cantonal matters (only cantonal non-participating online respondents)

whether or not to think that elections don't change anything anyway was a reason for the respondent to abstain from voting (only non-voters)

whether or not to think that elections don't change anything anyway was a reason for the respondent to abstain from voting on cantonal matters (only cantonal non-participating online respondents)

whether or not to think that your own vote doesn't matter anyway was a reason for the respondent to abstain from voting (only non-voters)