A vignette typically describes a hypothetical situation or object which respondents are asked to judge. The object is described as having different dimensions, the values of which are experimentally varied, so that their impact on respondents' judgments can be estimated. We examine 1) whether...

We compare two alternative mixed mode survey designs with face-to-face data collection in terms of differences in estimates. Both mixed mode designs involve face-to-face, telephone and web interviewing. One design uses modes sequentially; the other offers respondents an explicit choice of mode....

We assess whether the probability of a sample member participating at a particular wave of a panel survey is greater if the same interviewer is deployed as at the previous wave. Previous research on this topic mainly uses non-experimental data. Consequently, a) interviewer change is generally...