not use the internet. We run a large-scale opinion survey with (1) onliners in web mode, (2) offliners in face … sampling differences. In our setting, re-weighting online-survey observations appears a pragmatic solution when aiming at …

The ifo Education Survey is a representative opinion survey of the German voting-age population on education topics … dataset comprises several survey experiments that facilitate investigating the causal effects of information provision …, framing, and question design on answering behavior. This paper gives an overview of the survey content and methodology …