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Definition: 

Errors reported consistently over time and/or between responding units (generally undetectable by editing). A phenomenon caused either by the consistent misunderstanding of a question on the survey questionnaire during the collection of data or by consistent misinterpretation of certain answers in the course of coding. The systematic error does not lead necessarily to validity or consistency errors but always seriously compromises statistical results.

Source: 

UNECE Data Editing Group

Last edit:

06 Dec 2013

(Fiona Willis-Núñez)