expressed are those of the authors and not necessarily those of the U S Census Bureau Analysis of Questionnaire Errors in Survey Measurements of Census Coverage 2001

Abstract:  measurement error, validation, duplications In recent decades, U.S. censuses have produced relatively accurate population counts, but the considerable importance of the results has driven efforts to study and possibly correct the errors of coverage that occur. The 2000 Accuracy and Coverage Evaluation (A.C.E.) attempted to measure the net error of the census, originally with the intention of correcting the census counts for all purposes other than the apportionment of the House of Representatives. In turn, the accuracy of the A.C.E. was assessed by several evaluation studies, including a reinterview (the Evaluation Followup or EFU). Although many of the evaluations implied that the A.C.E. had been generally successful, the reinterview indicated that the A.C.E. had seriously underestimated some types of erroneous enumerations in the