To survey the general population, survey agencies often use sampling frames of landline numbers. However, these frames may exclude a relevant share of the target population. In 2012, 50% of Italian adults are excluded from the sampling frame, as they are unlisted (UN) or do not own a landline...

In the UK, in order to link individual-level administrative records to survey responses, a respondent needs to give their written consent. This paper explores whether characteristics of the respondent, the interviewer or survey design features influence consent. We use the BHPS combined with a...