Data Limitations Households dependent entirely on charity are excluded from the scope of the surveys Illiteracy of the population in general and particularly in rural areas is another issue that hampers the quality of the survey Household income and expenditure accounts are not kept by the households and there is a wide variation in the mode of the purchase of consumption goods from area to area, even from household to household Many statements of expenditure may be incorrect because of memory bias due to the long reference period for certain items
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