Data*collec0on*at*mul0ple*levels* Sampling*Sampling* Number* Stage* Unit* selected* Stage'1' Township* Wards' 2'wards'+'4' Stage'2' (urban)'+' VT'per' VTs'(rural)''township' Segment:' Street/ block' Stage'3' (urban)' +Village' (rural)' 1a.''Ward'/'village' administrator'interview' 70' townships' n=420' 1c..'Grocery''price' collecCon'' 2'streets'per' ward'+'2' villages'per' VT' 10'HH'per' Stage'4' Household* Segment' 1b.''OpenSignal' network'data'collecCon' n=8,138' '2a.'HH'head' interview' 2b.'Randomly' selected'HH' member' interview' 12'