Surveying recently arrived immigrants in countries lacking a population register poses many challenges. We describe our adaptation of Respondent Driven Sampling, a chain- referral technique, to sample migrants from Pakistan and Poland who had arrived in the UK within the previous 18 months....

Using a specially constructed international dataset of adult heights, we assess the extent, drivers and consequences of migrant selectivity, measured as relative height. This offers a measure of health selectivity that precedes emigration and is stable over time. Applying this measure to...