Subject Area1* | 2007 ACS 1-Year and 2005-2007 ACS 3-Year with Census 2000 |
2007 ACS 1-Year with 2006 ACS 1-Year |
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Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Race | Compare | Compare |
Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Hispanic or Latino Origin | Compare | Compare |
Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Ancestry | Compare Ancestry is the only item for which a "not reported" category is published since missing ancestries are never assigned or allocated. The extent of missing ancestry answers was higher in Census 2000 than in the ACS. The difference in the level of response may contribute to the difference in the two distributions. |
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Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Place of Birth | Compare | Compare |
Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Residence 1 year ago (Migration) | Do Not Compare The ACS asked for residence 1 year ago whereas Census 2000 asked for residence 5 years ago. |
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Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Relationship to Householder | Compare The ACS used a joint relationship/marital status edit and Census 2000 did not. Also, Census 2000 provided more response categories than the ACS. |
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Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Grandparents as Caregivers | Compare | Compare |
Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Marital Status | Compare The ACS used a joint relationship/marital status edit and Census 2000 did not. |
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Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Fertility | Do Not Compare The question was not asked in Census 2000. |
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Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Type of School & School Enrollment | Compare The ACS reference period was 3 months preceding the date of interview, while the Census 2000 reference period was any time since February 1, 2000. |
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Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Educational Attainment | Compare | Compare |
Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Ability to Speak English | Compare | Compare |
Language Spoken at Home | Compare | Compare |
Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Poverty Status of Families and People in Families | Compare with Caution The ACS collects data throughout the year on an on-going, monthly basis and asks for a respondent's income over the "past 12 months." Census 2000, however, collected the income data for a fixed period of time -- "during 1999" (the last calendar year). For example, the 2007 ACS 1-year data reflect incomes over 2006-2007 and the 2005-2007 ACS 3-year data reflect incomes over 2004-2007. In a comparison study between Census 2000 income data and the 2000 ACS, income collected in Census 2000 was found to be about 4 percent higher than that in the 2000 ACS. For more information on the differences of income in the ACS and Census 2000, see Income in the American Community Survey:Comparison to Census 2000. For specific questions and answers about sources of poverty data, see Questions and Answers about Sources of Poverty Data [PDF 130K]. |
Compare with Caution As ACS data are collected every month of the year, adjacent years will have some reference months in common. Hence, comparing the 2007 ACS with the 2006 ACS estimates is not an exact comparison of the economic conditions in 2007 with those in 2006. For a discussion of this and related issues, see Hogan, Howard, "Measuring Population Change Using the American Community Survey," Applied Demography in the 21st Century, Steven H. Murdock and David A. Swanson eds., Springer Netherlands, 2008. For specific questions and answers about sources of poverty data, see Questions and Answers about Sources of Poverty Data [PDF 130K]. |
Poverty Status of All People in the Poverty Universe | Compare with Caution The ACS collects data throughout the year on an on-going, monthly basis and asks for a respondent's income over the "past 12 months." Census 2000, however, collected the income data for a fixed period of time -- "during 1999" (the last calendar year). For example, the 2007 ACS 1-year data reflect incomes over 2006-2007 and the 2005-2007 ACS 3-year data reflect incomes over 2004-2007. In a comparison study between Census 2000 income data and the 2000 ACS, income collected in Census 2000 was found to be about 4 percent higher than that in the 2000 ACS. For more information on the differences of income in the ACS and Census 2000, see Income in the American Community Survey:Comparison to Census 2000. For specific questions and answers about sources of poverty data, see Questions and Answers about Sources of Poverty Data [PDF 130K]. |
Compare with Caution As ACS data are collected every month of the year, adjacent years will have some reference months in common. Hence, comparing the 2007 ACS with the 2006 ACS estimates is not an exact comparison of the economic conditions in 2007 with those in 2006. For a discussion of this and related issues, see Hogan, Howard, "Measuring Population Change Using the American Community Survey," Applied Demography in the 21st Century, Steven H. Murdock and David A. Swanson eds., Springer Netherlands, 2008. For specific questions and answers about sources of poverty data, see Questions and Answers about Sources of Poverty Data [PDF 130K]. |
Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Household and Family Incomes | Compare with Caution The ACS collects data throughout the year on an on-going, monthly basis and asks for a respondent's income over the "past 12 months." Census 2000, however, collected the income data for a fixed period of time -- "during 1999" (the last calendar year). For example, the 2007 ACS 1-year data reflect incomes over 2006-2007 and the 2005-2007 ACS 3-year data reflect incomes over 2004-2007. In a comparison study between Census 2000 income data and the 2000 ACS, income collected in Census 2000 was found to be about 4 percent higher than that in the 2000 ACS. For more information on the differences of income in the ACS and Census 2000, see Income in the American Community Survey:Comparison to Census 2000. The Census Bureau recommends using CPI-U-RS adjustment factors published annually by the Bureau of Labor Statistics (BLS) to adjust 1999 median, mean, and per capita income dollar amounts shown in Summary File 3 to 2007 dollars by multiplying the 1999 dollar amounts by the CPI-U-RS factor of 1.24438087. For CPI-U-RS inflation adjustment factors for other years see: BLS Consumer Price Index. Furthermore, direct comparisons of income and earnings distributions between Census 2000 and the 2007 ACS are not possible due to inflation. Users interested in making distribution comparisons need to inflation adjust individual income records using the Public Use Microdata Samples (PUMS) files from Census 2000 |
Compare with Caution As ACS data are collected every month of the year, adjacent years will have some reference months in common. Hence, comparing the 2007 ACS with the 2006 ACS estimates is not an exact comparison of the economic conditions in 2007 with those in 2006. For a discussion of this and related issues, see Hogan, Howard, "Measuring Population Change Using the American Community Survey," Applied Demography in the 21st Century, Steven H. Murdock and David A. Swanson eds., Springer Netherlands, 2008. |
Sources of Income (households) | Compare with Caution The ACS collects data throughout the year on an on-going, monthly basis and asks for a respondent's income over the "past 12 months." Census 2000, however, collected the income data for a fixed period of time -- "during 1999" (the last calendar year). In a comparison study between Census 2000 income data and the 2000 ACS, income collected in Census 2000 was found to be about 4 percent higher than that in the 2000 ACS. For more information on the differences of income in the ACS and Census 2000, see Income in the American Community Survey:Comparison to Census 2000. The Census Bureau recommends using CPI-U-RS adjustment factors published annually by the Bureau of Labor Statistics (BLS) to adjust 1999 median, mean, and per capita income dollar amounts shown in Summary File 3 to 2007 dollars by multiplying the 1999 dollar amounts by the CPI-U-RS factor of 1.24438087. For CPI-U-RS inflation adjustment factors for other years see: BLS Consumer Price Index. Furthermore, direct comparisons of income and earnings distributions between Census 2000 and the 2007 ACS are not possible due to inflation. Users interested in making distribution comparisons need to inflation adjust individual income records using the Public Use Microdata Samples (PUMS) from Census 2000. |
Compare with Caution As ACS data are collected every month of the year, adjacent years will have some reference months in common. Hence, comparing the 2007 ACS with the 2006 ACS estimates is not an exact comparison of the economic conditions in 2007 with those in 2006. For a discussion of this and related issues, see Hogan, Howard, "Measuring Population Change Using the American Community Survey," Applied Demography in the 21st Century, Steven H. Murdock and David A. Swanson eds., Springer Netherlands, 2008. |
Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Per Capita Income, Earnings (people), and Income (people) | Compare with Caution The ACS collects data throughout the year on an on-going, monthly basis and asks for a respondent's income over the "past 12 months." Census 2000, however, collected the income data for a fixed period of time -- "during 1999" (the last calendar year). For example, the 2007 ACS 1-year data reflect incomes over 2006-2007 and the 2005-2007 ACS 3-year data reflect incomes over 2004-2007. In a comparison study between Census 2000 income data and the 2000 ACS, income collected in Census 2000 was found to be about 4 percent higher than that in the 2000 ACS. For more information on the differences of income in the ACS and Census 2000, see Income in the American Community Survey:Comparison to Census 2000. The Census Bureau recommends using CPI-U-RS adjustment factors published annually by the Bureau of Labor Statistics (BLS) to adjust 1999 median, mean, and per capita income dollar amounts shown in Summary File 3 to 2007 dollars by multiplying the 1999 dollar amounts by the CPI-U-RS factor of 1.24438087. For CPI-U-RS inflation adjustment factors for other years see: BLS Consumer Price Index. Furthermore, direct comparisons of income and earnings distributions between Census 2000 and the 2007 ACS are not possible due to inflation. Users interested in making distribution comparisons need to inflation adjust individual income records using the Public Use Microdata Samples (PUMS) files from Census 2000. |
Compare with Caution As ACS data are collected every month of the year, adjacent years will have some reference months in common. Hence, comparing the 2007 ACS with the 2006 ACS estimates is not an exact comparison of the economic conditions in 2007 with those in 2006. For a discussion of this and related issues, see Hogan, Howard, "Measuring Population Change Using the American Community Survey," Applied Demography in the 21st Century, Steven H. Murdock and David A. Swanson eds., Springer Netherlands, 2008. |
Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Food Stamp Benefit | Do Not Compare The question was not asked in Census 2000 thus comparions cannot be made. |
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Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Class of Worker | Compare with Caution The Census 2000 tables use different tabulation categories than the ACS. However, PUMS data for Census 2000 and the ACS may be compared. When available, compare like universes. |
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Industry and Occupation | Compare with Caution The ACS codes are based on the 2002 North American Industry Classification System (NAICS) and are 4-digit codes, whereas Census 2000 codes are based on the 1997 NAICS and were 3-digit codes. Codes and descriptions, particularly within the Electronic Shopping, Internet Services, and Wholesale categories changed. Also, the Census 2000 tables did not include the "full-time, year-round" population and there were no median earnings Industry and Occupation tables. Thus, comparisons cannot be made for this population or characteristic. |
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Topic | 2007 ACS with Census 2000 | 2007 ACS 1-Year with 2006 ACS 1-Year |
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Group Quarters Population | Compare with Caution The total group quarters (GQ) population in the ACS may not be comparable with Census 2000 because: 1) There are some Census 2000 GQ types that were out of scope in the 2007 ACS such as domestic violence shelters, soup kitchens, regularly scheduled mobile food vans, targeted non-sheltered outdoor locations, crews of maritime vessels and living quarters for victims of natural disasters. Also, there are some Census 2000 GQ type categories that are no longer valid (residential care facility providing "Protective Oversight," hospitals/wards for the chronically ill and hospitals/wards for drug/alcohol abuse). The exclusion of these GQ types from the ACS may result in a small bias in some ACS estimates to the extent that the excluded population is different from the included population. 2) A sample of GQ facilities throughout the United States and Puerto Rico were selected for the ACS. ACS controls the GQ sample at the state level only. Therefore, for lower levels of geography, particularly when there are relatively few GQs in a geographic area, the ACS estimate of the GQ population may vary from the estimate from Census 2000. The 2005-2007 data is the weighted combination of 2006 and 2007 data. Therefore, the 3-year data must also be compared with caution. |
Compare with Caution - at National and State level Do Not Compare - below State level The weighting for the group quarters (GQ) population is controlled at the state level, but not at sub-state levels. For this reason, users may observe greater fluctuations in year-to-year ACS estimates of the GQ population at sub-state levels than at state levels. The causes of these fluctuations typically are the result of either GQs that have closed or where the current population of the GQ is significantly different than the expected population as reflected on the sampling frame. Substantial changes in the ACS GQ estimates can impact ACS estimates of total population characteristics for areas where either the GQ population is a substantial proportion of the total population or where the GQ population may have very different characteristics than the total population as a whole. Users can assess the impact that year-to-year changes in sub-state GQ total population estimates have on the changes in total ACS population estimates by accessing Table B26001 on American Fact Finder. Users should also use their local knowledge to help determine whether the year-to-year change in the ACS estimate represents a real change in the GQ population or may be the result of the lack of adequate population controls for sub-state areas. |
1* Each subject area is listed with its 2-digit code. This code corresponds to the second and third characters of the ACS table number. For example, Table B08303 - Travel Time to Work - has the digits of "08" in the second and third position. This corresponds to the subject Journey to Work; Workers; and Commuting.
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