This article discusses two recent evaluations of utility energy conservation programs in
which testsfor nonresponse bias were possible. In these evaluations, data were obtained
both from the sponsoring utilities (fuel consumption records, energy audit reports) and
from households (mail and telephone surveys). Fortunately, data from one source was
usually available for those households missing datafrom the other source. This permitted
comparisons of respondents and nonrespondents on several dimensions—pre- and post-
program energy consumption, energy audit results, and household demographic char
acteristics.
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