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Census to American Community Survey

Census to American Community Survey. Decennial Census. In Census 2000, the census used two forms “Long” Form – Collected the same information as the short form but also collected more in-depth information such as income, education, and language spoken at home

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Census to American Community Survey

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  1. Census to American Community Survey

  2. Decennial Census • In Census 2000, the census used two forms • “Long” Form – Collected the same information as the short form but also collected more in-depth information such as income, education, and language spoken at home • “Short” Form – Asked for basic demographic and housing information, such as age, sex, race, how many people lived in the housing unit, and if the housing unit was owned or rented • Only a small portion of the population, called a sample, received the long form.

  3. 1990 Census to 2000 Census

  4. 2010 Census Short form only Same basic demographic questions as 2000. Same geographic detail as 2000

  5. 2010 Census and American Community Survey • 2010 Census will focus on counting the U. S. population • The sample data are now collected in the ACS • Same “short form” questions on the ACS

  6. American Community Survey: Similarities with Census 2000 • Same Questions and many of the same basic statistics • 5-year estimates will be produced for same broad set of geographic area including census tracts and block groups

  7. American Community Survey: Data from the ACS can be grouped into four categories Demographic Social Economic Housing

  8. American Community Survey: Demographic Characteristics • Sex • Age • Race • Hispanic Origin

  9. Education Marital Status Fertility Grandparents Veterans Disability Status Place of Residence 1-year ago Citizenship Year of Entry Language Spoken at Home Ancestry / Tribal Affiliation American Community Survey: Social Characteristics

  10. American Community Survey: Economic Characteristics • Income • Benefits • Employment Status • Occupation • Industry • Commuting to Work • Place of Work

  11. American Community Survey: Housing Characteristics • Tenure • Occupancy and Structure • Housing Value • Taxes and Insurance • Utilities • Mortgage / Monthly Rent

  12. 2000 Census to ACS 2008

  13. American Community Survey: 2008 Content Changes • Three new questions • Health Insurance Coverage • Veteran’s Service-related Disability • Marital History • Deletion of one question 1. Time and main reason for staying at the address • Changes in some wording and format

  14. Health Insurance Coverage

  15. Veteran’s Service-related Disability

  16. Marital History

  17. American Community Survey: Methodology • Sample includes about 3 million addresses each year • Three models of data collection: 1. Mail 2. Phone 3. Personal Visit • Data are collected continuously throughout the year • High levels of quality have been demonstrated

  18. American Community Survey: Period Estimates • ACS estimates are period estimates describing the average characteristics over a specified period • Contrast with point-in-time estimates that describe the characteristics of an area on a specific date • 1-year, 3-year, and 5-year estimates will be released for geographic areas that meet specific population thresholds

  19. Most ACS questions do not stipulate a period of time that should be referenced Interpretation is yearly average since the data are collected each month and averaged across months Questions with no specific reference period

  20. Other questions specify a period of time relative to the date of interview Interpretation is still a yearly average but covering a slightly different period of time than the calendar year Questions with a specific reference period relative to interview date

  21. American Community Survey: Data Products Release Schedule

  22. What is Sampling Error? Definition The uncertainty associated with an estimate that is based on data gathered from a sample of the populationrather than the full population

  23. What is Non-Sampling Error? Definition: Any error affecting a survey or census estimate apart from sampling error Occurs in complete censuses as well as in sample surveys

  24. Types of Non-Sampling Error • Non-Response Error • Response Error • Processing Error • Coverage Error

  25. American Community Survey: Key Differences from Census 2000 • Beginning in 2010, data for small geographic areas will be produced every year versus once every 10 years • Data for larger areas are available now and data for mid size area will be available in December 2008 • Census 2000 data describe the population and housing as of April 1, 2000 while the ACS data describe a period of thime and require data for 12 months, 36 months, or 60 months

  26. American Community Survey: Key Differences from Census 2000 • The goal of ACS is to produce data comparable to the Census 2000 long form data • These estimates will cover the same small areas as Census 2000 but with smaller sample sizes • Smaller sample sizes for 5-year ACS estimates results in reductions in the reliability of estimates

  27. www.census.gov 3 4 1 2

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