Census Information by HC12043021512

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									Census Information
    Patricia Kenly


                Aug. 4, 2005
                CENSUS
• In many things we do daily, the census
  has affected us –
  – the roads we use (and the expansions!)
  – the hospital near us
  – what our nearby supermarket carries
  – the location of our nearby supermarket
  – the location of schools
                  USES
• Federal government – in planning,
  financial allocations to states
• State agencies/legislatures – reapportion
  state and local districts
• Community planning – long-range needs
• Business use – marketing, site selection
• School districts
                 HISTORY
• Mandated by U.S. Constitution (Art. 1, Sec.2)
• Fundamental purpose: reapportionment for
  the House of Representatives (max. 435
  seats)
• Yet, framers of Constitution realized other
  uses –
  – growth potential
  – where we are, have been, and are going as a
    nation
     CENSUS GEOGRAPHY
• Census tract – 1,000-8,000 pop.
• Block group – from 300-3000 pop.
  – on a map, a single digit
• Block – smallest level – bounded by a
  street, or water, or railroad

• Census designated place (for example,
  Sandy Springs in prior years)
             ZIP CODES
• Census Bureau points out that these are
  developed for convenience of another
  governmental unit, and they cross
  boundaries
• Commercial publishers have products that
  have tried to overlay these with census
  tracts, etc (some sources at Ready Ref.)
• So, use with caution
              SAMPLING
• Introduced with the 1940 census (impetus
  from the American Statistical Association)

• By 1970, 1 in 5 received the long form
  (ratio is now 1 in 6)

• Beginning in 1960, Bureau provided
  “public-use microdata sample” files (PUMS)
  so that statisticians could generate their
  own tables and models.
            CONFIDENTIALITY
• Info. gained is for statistical purposes only
  (though many years ago some breaches)
• Info. published CANNOT identify an individual
  or establishment (business) –
  – so, to the block level, only a few items reported
  – before 1990, table cells left blank if too few items
  – so, Bureau started using “data swapping” – within
    a Census Tract
     MAJOR DATA PRODUCTS
• 1990 – CDROMs (many, many) – from
  Summary Tape Files (STF)
• 2000 – DVDs – from Summary Files (SF)
  – ability to do cross-tabulations


• SF1 – 1000 items – everyone – to block level
• SF3 - > 3000 items – sample – to block group
• SF4 >10,000 items – sample – to tract level
              SHORT FORM
•   Age (birthdate too)
•   Sex
•   Owner or renter
•   Household relationship
•   Race (several questions – also free-form
    for “some other race”)
    – note: “Spanish/Hispanic/Latino” is separate
      from the race questions
               LONG FORM
            population questions
•   Marital status (including “never married”)
•   School enrollment
•   Educational attainment
•   Language other than English
•   Place of birth – state (if U.S.) – or – country
•   Citizen?
•   Disability (physical, mental)
•   Military service (select specific time frames)
          LONG FORM
    more population questions
• Address of employer
• Name of employer
• Occupation (fill-in)
• Income
• Commute info. – time; specific mass
  transit, carpool, etc.
• Layoff, when last worked
                  LONG FORM
                housing questions
•   Mobility (did you live in the residence 5 years ago?)
•   $ - rent – or – mortgage (and if 2d mortgage)
•   Value of property
•   Year structure built
•   Description of structure (mobile home, boat, 20-49
    apts., etc.
•   # - bedrooms
•   Utilities (specific ones) - costs
•   # vehicles
•   Insurance costs
                   2010
• NO long form!!

• 5-year averages from American
  Community Survey to be available for
  small geographic areas
   American Community Survey
• “the most important development in federal
  statistics in 50 years” –
  – Bea Piddock, Census Bureau – Atlanta office
• conducted throughout the year, each year
• responses are for CURRENT address
 (very important for areas with seasonal residents)
• for large cities, 2003 data available now
• over 5-year period, sample size same as for
  decennial census
American Community Survey




from The American Community Survey: an Overview
   www.census.gov/mso/www/pres_lib/index2.html
       GETTING STARTED
• Census website – www.census.gov

• Specifically, the “American Factfinder” on
  the site – http://factfinder.census.gov/

• Consult chart from Univ. of Minn. (next
  slide)
http://govpubs.lib.umn.edu/census/pathfinder1.phtml
      www.census.gov




Amer.Factfinder
American Factfinder
                      Fact Sheet
Fact Sheet: Clearwater, FL




 Note % over age 65 vs US
   Fact Sheet: Atlanta




Note % over age 65 vs US




        Note % rent vs US




                Click to view details
Atlanta: Social Characteristics (from “show more” link)
People: Atlanta
           Housing: Atlanta




 Select
   for
detailed
  info.
Table QT-H2 – Tenure, Household Size, & Age of Householder
                        Atlanta - 2000
   DATA INTERPRETATION
• That’s the key – statisticians, government
  planners and marketers try to determine the
  important relationships –
  – for example, Atlanta’s “high” renter statistic –
     •   are housing prices here out of reach for renters?
     •   are the apts. in trendy areas where few homes are?
     •   do we have a younger population?
     •   do we have a more mobile population?
     •   what about the nearby cities/counties?
             “DATA SETS”
        (from American Factfinder)
• Can compare more than one geographic
  region

• Can create tables for specific variables

• But – many,many variables from which to
  choose. Consider using keyword.
                Select from the following:




  Options
for selecting
  specific
  tables –
drill-down to
 geographic
area desired
Selecting Summary File (SF 3) – Detailed Tables




                          After highlighting a county name,
                                     select “add”




                                     select “next”
       easiest way to find
       data; still, 75 tables
         have this word
rent
rent




       Click on this
       when finished
The first table; showing Gross Rent for DeKalb & Fulton
The second table; showing rent as % of income;
               DeKalb & Fulton
        (note: scroll down to see this)
MAPS to identify census tracts, etc.        select
                                       “Reference Maps”
select this




          3400 spruell cir

         alpharetta
        census tract   specific street




block

                                     block
                                     group
Or, click on national map – with each click, can zoom in
Census tracts: 908.02, 114.03, 116.07,…
Block groups: 3 , 6 , 7
Census tract: 116.07 ; Block group : 7 ; Block : 7016 ; 7020 ; 7021 …
           GEORGIA
    POPULATION PROJECTIONS
• www.opb.state.ga.us/
      select the population projections – (lower
  right frame)
            - OR -
• Direct link from catalog to 18 page pamphlet
  (best choice)
• Maps (embedded – “show me the map”) are
  s-l-o-w to load
              GEORGIA
       POPULATION PROJECTIONS
• Specific data – populations by race/ethnicity:
  – 2000 census – Hispanic population – 400,000
  – 2015 projection – Hispanic population – 1,000,000
• Counties with huge growth rates (2000-2015):
  –   Forsyth – 137%       Pickens – 90%
  –   Henry – 135%         Lee – 91%
  –   Dawson – 87%         Gwinnett – 75%
  –   Cherokee – 91%
from www.gcensus.com - fun to see, but for data, need to go to
 commercial sites (i.e., a fee). Useful for land density in general.
    BASIC PRINT SOURCES
• Statistical Abstract of the United States
  (C3.134: Ready Reference)
  also has web version (URL changes):
  www.census.gov/prod/www/abs/statab.html
• Historical Statistics of the United States,
  Colonial Times to 1970
  (C3.134/2:H62/610-970 - Ready Reference)
  Link to Census websites from our catalog entry
                     REFERENCES
• Encyclopedia of the Census [HA37.U55 C66-at SFM desk]
• Understanding the Census [HA201 1990AR –at SFM desk]
• Census Toolkit [from Univ. of Michigan]
  www.lib.umich.edu/govdocs/census2/centool.pdf
• Factfinder for the Nation
  www.census.gov/prod/2000pubs/cff-4.pdf
• Government Publications Library [from Univ. of Minn.]
   http://govpubs.lib.umn.edu/census/
• GeoStat Center [from Univ. of Virginia]
  http://fisher.lib.virginia.edu/collections/stats/histcensus/

								
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