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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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decennial census
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.
2010 census
2010 Census

Short form only

Same basic demographic questions as 2000.

Same geographic detail as 2000

2010 census and american community survey
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
american community survey similarities with census 2000
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
american community survey
American Community Survey:

Data from the ACS can be grouped into four categories

Demographic

Social

Economic

Housing

american community survey social characteristics
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
american community survey economic characteristics
American Community Survey: Economic Characteristics
  • Income
  • Benefits
  • Employment Status
  • Occupation
  • Industry
  • Commuting to Work
  • Place of Work
american community survey housing characteristics
American Community Survey: Housing Characteristics
  • Tenure
  • Occupancy and Structure
  • Housing Value
  • Taxes and Insurance
  • Utilities
  • Mortgage / Monthly Rent
american community survey 2008 content changes
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
american community survey methodology
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
american community survey period estimates
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
questions with no specific reference period
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
questions with a specific reference period relative to interview date
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
what is sampling error
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

what is non sampling error
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

types of non sampling error
Types of Non-Sampling Error
  • Non-Response Error
  • Response Error
  • Processing Error
  • Coverage Error
american community survey key differences from census 2000
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
american community survey key differences from census 20001
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
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