This report – PMA2020 Methodological Report No.1: Response Patterns on Behavorial Outcomes in Relation to Use of Resident Enumerators Over Multiple Survey Rounds – is the first in a series of Methodological Reports that aims to explain and contextualize PMA2020 methodologies. It focuses on the unique socio-demographic profile of PMA2020 Resident Enumerators (from Burkina Faso, Ethiopia, Ghana, Kenya and Uganda) and examines potential differential reporting trends introduced by acquaintance between the REs and the survey respondents