The regulation of migration and mobility has become one of the more salient political issues of our time. Yet, despite the massive focus on migration and its consequences, we still know relatively little about many migrant groups.

In an article published in International Journal of Social Research Methodology, Guri Tyldum summarises the pro and cons of using so called respondent-driven sampling (RDS) as a methodology for sampling and analysing survey data from rare and elusive populations such as migrants.