Differences in estimates due to changes in methods of data collection.

Author(s)
Kersten, H.M.P. & Moning, H.J.
Year
Abstract

For the National Travel Survey until 1985 face-to-face interviews were used to collect data. Due to limited financial resources, from 1985 on data are used which are obtained by telephone/mail interviews. The authors were able to compare the results of both methods of interviewing on the basis of an experiment: in two specific months both a telephone/mail survey and a face-to-face survey were held. The estimates based on the group of telephone respondents and those based on the face-to-face respondents were not the same. It came out that the differences were significant and can to a large extent be explained by coverage errors, by the structure of the response and by the length of the reporting period. (Author/publisher)

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Publication

Library number
940420 ST [electronic version only]
Source

Voorburg, Netherlands Central Bureau of Statistics, Department of Statistical Methods / Department of Statistics of Traffic and Transport, 1985, 17 p., 6 ref.

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