For hard-to-survey populations such as ethnic minorities and immigrants, increasing survey response rates is a crucial element of the fieldwork as these populations often show a higher likelihood of not participating compared with the native population. However, no study has so far compared different strategies for mobilisation within this group.…

Guidelines for conducting surveys by mobile phone calls in low- and middle-income countries suggest keeping interviews short (<20 minutes). The evidence supporting this recommendation is scant, even though limiting interview duration might reduce the amount of data generated by such surveys. We recruited nearly 2,500 mobile phone users in…

Background/Context: Social network analysis has been used to demonstrate an association between individuals' relationships and their engagement in areas such as public health (Perry & Pescosolido, 2015) and teacher professional development (Penuel, 2009). We extend and apply this approach to the higher education context. We operationalize…