“…The anticipated social consequences of engaging in MMT are also believed to shape MMT acceptance , yet the social context of access to MMT in prisons in Moldova, EECA, and elsewhere is poorly understood. In Moldova and other EECA countries, informal governance by prisoner hierarchies exerts control over the social order of prison communities by monopolizing and pooling resources, including access to drugs (Azbel, 2020;Azbel et al, 2021;Butler et al, 2018;Gasparyan et al, 2018;Kupatadze, 2014;Liberman et al, 2021). This informal governance operated by a caste system (i.e., hierarchies) of prisoners can compensate for the limited resources (e.g., food, personal hygiene, etc.)…”