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Census Geography (Legal Entities)
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  1. Census Geography (Legal Entities) • Nation • State • Counties • Minor Civil Divisions • Boroughs, Townships • Place • Towns, Cities, Villages

  2. Census Geography (Stat. Entities) • Blocks • Small areas bounded by physical features • Block Groups • Collections of Blocks • A Census Tract Subdivision • Census Tracts • As Homogeneous As Possible • Roughly 1,000 – 8,000 persons

  3. Census Geography (Stat. Entities) • Census-Designated Places • Urbanized Areas • At least 50,000 population • Density of 1,000/sq.mi. at core • Density of >= 500/sq.mi. at periphery of core • Urban Cluster • Consists of the density requirement of UA

  4. Census Geography (Stat. Entities) • Metropolitan Areas • Large population nucleus • High degree of integration at nucleus • Social • Economic • Functional • Boundary theoretically defined by spatial extent of integration

  5. Census Geography (Stat. Entities) • MA • Freestanding MSA not closely aligned with another MA • PMSA • An MA with > 1,000,000 population that is subdivided into contiguous MAs • CMSA • A specific collection of PMSAs

  6. Census Sampling Patterns • Short Form • As near “census” as possible • SF1, SF2 & Redistricting Summary File • Long Form • 1 in 6 receive survey • Constitutes the 1% and 5% samples • SF3, SF4 & PUMS (among others)

  7. Short Form Census • Only Seven Questions • Fulfills the Constitutional Obligation • Decennial Enumeration of Population • Congressional Representation

  8. Short Form Questions • Name • Sex • Age • Relationship • Hispanic Origin • Race • Tenure (owner or renter)

  9. Demographic Oddities • Shifting definition of “hispanic” over time • 2000 Census first to consider multi-racial categories

  10. Long Form Questions • Moving away from original intent of decennial census • Questions much more probing and sensitive • Purpose? • Qualifying for federal funding & grant programs

  11. Data Files Consist of Tables • Population (P) • Housing (H) • Population at Census Tract level (PCT) • Tables are indicated by prefix and a number

  12. Example • P12 • Sex by Age (5-year groupings)