“…These paradata are also used to examine the effect of increased fieldwork efforts (e.g., repeated contact attempts, refusal conversion) on reducing nonresponse bias (Lynn & Clarke, 2002;Moore et al, 2018). In contrast, call record data and doorstep interactions proved to be of little use in improving the quality of nonresponse adjustments (Biemer et al, 2013;Maitland et al, 2009;Peytchev & Olson, 2007;Wagner et al, 2014)-either due to low correlations between paradata-derived indicators and key survey variables (Hanly et al, 2016;Kreuter & Kohler, 2009;Peytchev & Olson, 2007;Wagner et al, 2014) or due to underreporting of contact attempts by interviewers (Biemer et al, 2013). Interviewer observations about the housing unit and its members (e.g., type of household, presence of children, receipt of unemployment benefits) also do not have substantial utility in nonresponse adjustment, as they do not predict response outcomes and key survey variables well (Kreuter et al, 2010;West et al, 2014).…”