1 Journey-to-Work Data in the American Community Survey (ACS) May 17, 2009 TRB Transportation Planning Applications Conference Federal Data for Modelers Workshop Houston, TX Melissa Chiu, CTPP Coordinator Journey to Work and Migration Statistics Branch Housing and Household Economic Statistics Division U.S. Census Bureau
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Journey-to-Work Data in the American Community Survey (ACS)
Journey-to-Work Data in the American Community Survey (ACS). May 17, 2009 TRB Transportation Planning Applications Conference Federal Data for Modelers Workshop Houston, TX Melissa Chiu, CTPP Coordinator Journey to Work and Migration Statistics Branch - PowerPoint PPT Presentation
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Journey-to-Work Data in the American Community Survey
(ACS)
May 17, 2009TRB Transportation Planning Applications Conference
Federal Data for Modelers WorkshopHouston, TX
Melissa Chiu, CTPP Coordinator Journey to Work and Migration Statistics Branch
Housing and Household Economic Statistics DivisionU.S. Census Bureau
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What is the American Community Survey?
A large, continuous demographic survey– Produces annually updated single-year and multi-
year estimates of the characteristics of the population and housing
– Produces characteristics, not a population count– Produces information for small areas including
tracts, block groups and population subgroups - updated every year
– Key component of reengineered 2010 census
Survey designed to include– U.S. stateside and Puerto Rico – Population in both housing units and group quarters
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How Does the Sample Compare?
ACS samples every year and spreads sample over 12 months; census samples once a decade and uses the entire sample at the same time
ACS subsamples for personal visit follow-up; court ruled against census subsampling
Census sample estimates based on about 18 million housing units; ACS 5 year estimates based on about 11 million housing units
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ACS Data Release Schedule
Data products are released in the year following the single year or multiyear period in which data are collected.
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December 2008: First Multiyear Estimates
Data collected 2005-2007 – Based on data from housing unit population in 2005-2007;
group quarters population 2006-2007– First release of ACS data for mid-sized counties, other areas– First release of two sets of ACS estimates for states, large
counties, Congressional Districts, Public Use Microdata Areas (PUMAs)
Most data products similar to those of past years
Inflation-adjusted to 2007Geography based on January 2007
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Web Site and Training
ACS Compass Products– Understanding and Using ACS Data:
Handbook Series– Presentations
• Slides and presentation notes• Various aspects of the ACS