Transcript The American Community Survey - University of California

The American
Community
Survey
HSUG-West Conference
October 1, 2004
Berkeley, CA
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What is the American Community
Survey?
• A large, continuous demographic survey
• Annual estimates on detailed social,
economic, and housing characteristics
• Produces more timely information for
small areas
• Will replace census long-form in 2010
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Background
• Concerns with outdated data
• Began testing in 1996
• Large-scale testing from 1999 to present
• Full Implementation in 2005 pending
congressional funding
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ACS-to-Census Comparison
• 20 million long-form households
• 250,000 households a month in ACS
• 3 million households a year
• Households contacted once every 5 years
at most
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How ACS Data is Collected
• Three methods of data collection:
– Mail
– Telephone (CATI)
– Personal Interview (CAPI)
• All data collection completed with trained
permanent staff
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Master Address File (MAF)
• Sample cases selected from an updated
Census 2000 Master Address File (MAF)
• Continual update through the use of
– Delivery Sequence File from USPS
– Community Address Updating System
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Full Implementation 2005
• Implement an annual national sample of 3
million addresses
• Provide profiles every year for
communities of 65,000 or more
• Provide 3- and 5-year accumulations for
communities of less than 65,000
population
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Group Quarters
• Start delayed until January 2006
• Includes all types of GQs except street
homeless, ships at sea, domestic violence
shelters, and natural disaster shelters
• First tested in the ACS in 1999 and 2001
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Annual and Multi-Year Estimates
• By 2010, long-form data will be available
annually down to the Census Block Group.
t = Data reflect American Community Survey testing through 2004
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ACS Content
• Similar to the long-form, ACS will provide
information on:
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Families, children, the elderly
Income, poverty
Educational attainment, school enrollment
Work, unemployment
Disability
Immigration, language ability
Housing
And more
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Housing Data Included
• 25 Housing variables included in ACS
(http://www.census.gov/acs/www/SBasics/
SQuest/fact.htm)
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Current ACS Data Products
• Base Tables (American FactFinder)
– More than 800 tables similar in content to Census
2000 SF3
• Tabular Profiles
– Single-year and change profiles
• General Demographics, Social Characteristics,
Economic Characteristics, Housing Characteristics
• Narrative Profiles
• Geographic Ranking Tables
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ACS PUMS Files
• Allows the user to create their own crosstabulations using a 1% sample of the universe
• PUMS files produced for ACS sites in 1996-1998
• National PUMS files are available for 2000-2002
– State is lowest geographic level available
• Beginning in 2006 PUMS files will be produced at
– PUMA (~100,000 population) as lowest geographic level
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Online Access
• Tabular and Narrative Profiles (1999-2003):
http://www.census.gov/acs/www/
• American FactFinder (1996-2003):
http://factfinder.census.gov/
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Concerns About ACS
• Adequate funding year-to-year
• Sufficient sample sizes
• Accurate and up-to-date Master Address
File
• Group Quarters population
• Using averaged data for smaller
geographies
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