Résumé
Recent estimates indicate that half of Ethiopian girls aged 15-19 years have experienced female genital mutilation/cutting (FGMC). Establishing whether and how pro-FGMC norms are maintained through social transmission is a key priority for global eradication efforts. Here we present the first large-scale socio-centric social network study estimating social influence and social selection on preference for cutting female relatives using data from 5,163 Ethiopian Arsi Oromo adults. Statistical modelling, which accounts for network dependence in cross-sectional data, finds signals of 'contagion' within chatting, respect and money-borrowing networks. This indicates that social influence contributes to FGMC maintenance. We find no clear evidence of social selection within marriage-advice networks, suggesting these networks are not implicated in FGMC maintenance. Contrary to assumptions underpinning current eradication efforts, we find negligible evidence that FGMC is a social coordination norm (with only 6.3% endorsement) or an empirical or normative expectation. We conclude by making intervention design recommendations.