, , , . .
(surrogate information error) , , , . , ( ) , .
(measurement error) , , , . , , , , .
(population definition error) , , , . , .
. ?
, , : 50 ; 20% , ; 250 ; 30% , . , [24].
, .
(sampling frame error) , , , . , , , , , , .
(data analysis error) , . , .
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, , , , .
(respondent selection error) , , , , , . , , Wall Street Journal 15 19 , .
(questioning error) , , . , , .
(recording error) , . , ( ), .
(cheating error) , . , , , .
, , .
(inability error) . - , , , , , . , , .
(unwillingness error) - . , , . , , Time, .
; , . , . , . , , .
, , , . , . , , , [25]. , . .
, , . , , . , . 30%. , . , 45% 55% . , . , .
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