In March 2012, the LISS panel completed a questionnaire about choosing between people. This study uses a vignette approach, requiring respondents to choose each time between two descriptions selected at random from 500 vignettes supplied by the study’s commissioning client. In the section about formal (public) solidarity, eight characteristics are described for the individuals, and in the section about informal (private) solidarity, five characteristics are described. The characteristics are moreover displayed in random order (vertically) on the screen for each respondent.