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Unmatched Number

Edited by: Published: 2008
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An unmatched telephone number is one that does not have a mailing address associated with it. Typically, it also does not have a name matched to it. The vast majority of unmatched telephone numbers are also unlisted telephone numbers. The proportion of unmatched numbers in a telephone survey that uses matching as a technique will depend upon the extent to which the survey organization uses multiple vendors to do their matching and the quality of the matching techniques and databases the vendor uses. However, in random-digit dialing surveys in the United States, regardless of how many matching vendors are used, a large minority of numbers can never be matched to an address because that information simply is not accessible to any matching company. This is ...

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