I analyze the effects of household sociodemography, interviewer perfor-
mance in the current survey, and fieldwork characteristics on cooperation
in a central telephone survey, where households with no publicly listed
landline number receive face-to-face visits. Using the 2013 refreshment
sample of the Swiss Household Panel, I employ household-interviewer
cross-classified multilevel models and analyze first and later contacts sepa-
rately. Some sociodemographic groups are less cooperative in the first con-
tact only, others in both the first and later contacts, and still others in later
contacts only. I offer recommendations about which households should be
finalized at the first contact, which should be transferred to the face-to-face
sample instead of being worked by telephone, and which interviewers
should work which household groups.