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(k) When designing the data collection system using surveys of households or persons, special attention should be brought to the sampling/selection of households or persons and informants, as well as the cost, response burden and sparsity of responses obtained, etc. Compilers should weigh how those sources can be used for the various data needs identified. In particular, increasing the size of samples may significantly increase costs and alternatives may involve using auxiliary information to better target the population to be covered.
Next: B. General purpose and description of population censuses and persons and households surveys