Excerpt from The Nature of Residential Telephone Usage, and Reliability of Reporting
This paper examines long distance toll calling rates for residential telephone subscribers in Quad Cities, Illinois/Iowa. Accurate information on calling rates allows an examination of the degree to which toll calls follow certain distributional assumptions commonly made in marketing research concerned with frequently purchased goods and services. A number of shortcomings are found in the fit of the Poisson distribution to the number of calls in a period and the Normal distribution has a severely truncated tail at zero.
These distributional assumptions underlie models which relate perceived calling rates, reported by household heads, to actual usage. After the deletion of extreme observations the optimal estimate of a respondent's calls weights the survey response at about twice the level of the population mean.
Calling rates are not significantly related to socioeconomic group, but the reliability of reporting them is. Wives prove to be more reliable respondents than husbands in most segments. Differences between the responses of husbands and wives does not provide a good indication of accuracy but consistency between the average bill reported and the average calls reported do.
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