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What Does Variation in Survey Design Reveal about the Nature of Measurement Errors in Household Consumption?


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World Bank, Washington, DC
Africa | Tanzania
2013-04-11T17:15:01Z | 2013-04-11T17:15:01Z | 2013-02

This paper uses data from eight different consumption questionnaires randomly assigned to 4,000 households in Tanzania to obtain evidence on the nature of measurement errors in estimates of household consumption. While there are no validation data, the design of one questionnaire and the resources put into its implementation make it likely to be substantially more accurate than the others. Comparing regressions using data from this benchmark design with results from the other questionnaires shows that errors have a negative correlation with the true value of consumption, creating a non-classical measurement error problem for which conventional statistical corrections may be ineffective.


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