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The Impact of the Current Residence Rule in the ACS Stephanie Baumgardner U.S. Census Bureau

The Impact of the Current Residence Rule in the ACS Stephanie Baumgardner U.S. Census Bureau Preliminary Results Presented to the State Data Center National Meeting October 15, 2009. Using H25 to Identify ‘Current Residence Only’ Households.

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The Impact of the Current Residence Rule in the ACS Stephanie Baumgardner U.S. Census Bureau

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  1. The Impact of the Current Residence Rule in the ACS Stephanie Baumgardner U.S. Census Bureau Preliminary Results Presented to the State Data Center National Meeting October 15, 2009

  2. Using H25 to Identify ‘Current Residence Only’ Households • For purposes of this analysis, ‘current residence only’ households are defined as all occupied housing units providing: • a response of “No” to H25a and • a value of 2-5 months in H25b

  3. Methodology – “Current Residence Only” Rates • Unedited data from 2003-2007 ACS were used to approximate a 5-year estimate (2003 and 2004 had a reduced sample in many areas) • Due to sample design in 2003 and 2004, rates are only possible for 1,240 counties and sub-county entities in those counties (25,406 total areas) • Rates of ‘current residence only’ households calculated as ratio of estimate of ‘current residence only’ households to total households

  4. Rates of ‘Current Residence Only’ Households Analysis focused on counties, places, and MCDs in the study sample with a population of less than 20,000 Very few small geographies have high rates of ‘current residence only’ households.

  5. Areas Selected for Case Studies

  6. Case Study Methodology • Calculated characteristics in two ways: • Treated ‘current residence only’ households as occupied households (current ACS methodology). • Treated ‘current residence only’ households as vacant housing units (simulation of decennial census methodology). • Calculated the difference between the two measures and computed the margin of error at the 90% level for all differences.

  7. Case Study Results There were no statistically different measures for race, median age, and median income among all case study geographies. Five MCDs had no statistically significant differences. The distribution of PPH and vacancy rate characteristics showed the highest number of statistically significant differences.

  8. Case Study Results Case study results do not suggest that the inclusion of ‘current residence only’ households in the ACS estimates significantly alters the distributions of most basic housing and population characteristics. The different residency concepts used in the ACS and the decennial census do not generally capture different populations even for the smallest areas.

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