The American Community Survey Summary of a Workshop (2001) / Chapter Skim
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1. Introduction
1. Introduction
Pages 1-6
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Unlike any other national survey, the ACS will provide information on the American population at substate levels, i.e., counties and cities. Over a 5-year period, the survey's sample size will approximate that of the census long form, supporting the production of estimates, possibly through use of statistical modeling, for small and nonstandard geographical areas, such as school districts and traffic analysis zones.
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The three primary types of information sources for individuals and households in the federal statistical system are the decennial census, various household surveys, and administrative records systems, e.g., tax and food stamp records. The planned ACS has various advantages in comparison to these other sources.
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Now that data collection has matured as the ACS demonstration phase is well under way, the Census Bureau is developing a research plan and initiating research to address all issues related to ACS methodology. Fall 1998 therefore seemed an opportune moment for a workshop to assist the Census Bureau in developing a research agenda to deal with many of these challenging issues.
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The demonstration period is now to be followed by two comparison studies in 1999-2001 and 2000-2002 comparing ACS and census longform information. Full implementation of ACS will begin in 2003, with an ongoing sample size of 3 million housing units a year (a sampling rate of approximately 3% 15% over five years compared with 17%, on average, for the census long form)
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THE WORKSHOP: PURPOSE AND STRUCTURE To maximize the interchange of ideas during the limited time available in a 1-day workshop, selected experts were asked to prepare thought pieces to address one of six methodological issues: combination of information crosssectionally, combination of information across time, the impact of variance on ACS outputs as inputs into fund allocation formulas, weighting to accommodate nonresponse, undercoverage, etc., issues related to sample and questionnaire design, and calibration of the ACS with the census long form. For some of the issues, discussants were also selected.
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6 THE AMERICAN COMMUNITY SURVEY through 7 treat the individual methodological issues in turn, namely, combination of information across areas, combination of information across time, concerns involved in the use of the ACS as input to funding formulas, weighting issues in the ACS to treat nonresponse and undercoverage, sample and questionnaire design issues, and calibration of the ACS to the census long form. In each chapter, the topics are first introduced, followed by summaries of the presentations and the floor discussion; Chapter 8 provides some final comments.
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