Apresenta

1
Directorate of SurveysPost Enumeration Survey
Measuring Census Coverage Post Enumeration
Survey The 2000 PES and 2010 project
Paraguay, 3-7 August, 2009
2
República Federativa do Brasil Acronym
BR Federal Capital Brasília Population in 2009
191,480,630 Men 93,962,767 Women
97,517,863 Area 8,514,876 km2 Density of
population 22.48 inhab/km2
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Why do we evaluate Census?

• Census does not count every household or person
• In Brazil in 2000, we estimated that around 9
  million persons (5,52) were not counted
• Over/Undercount causes bias in estimates and
  measuring them helps users to better use the
  data.
• Not have any measure of coverage quality may
  affect the credibility of Census

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Why do we do PES?

• To improve the necessary sources for indirect
  methods is more difficult and costly
• The PES allows to identify kinds and level of
  coverage errors and helps to know where to
  improve more.
• Training?
• Cartography ?
• Supervision?
• IBGE does not adjust Census results based on the
  PES

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What we calculated through the PES

• Estimate undercount of dwellings and persons
• Estimate overcount of dwellings and persons
• Calculate coverage rates gross and net
• Brazil, Region, State, Urban/Rural, Age(range)

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2000 Census PES

• Independence of PES from the Census
• Independent sample frame (from the EA file)
• Different team for data collection
• Data collection started after finishing Census
• Confidentiality on PES sample areas

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2000 Census PES

• Scope
• Private dwellings and persons living in private
  dwellings
• PES does not cover collective dwellings
• National coverage
• Rural and urban areas (except rural of the North
  region)
• All kind of enumeration areas including favelas

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2000 Census PES

• Sampling
• Size
• 1,356 Enumeration Areas
• 301,230 dwellings
• 1,168,494 persons (0,7)
• 68 confidence level for 0,2 error
• Two-stage sampling
• 1st stage - selection of enumeration areas in
  the States
• 26 states and 1 DF (Federal District)
• 2nd stage - 10 of the dwellings in each EA

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2000 Census PES

• Questions
• Dwelling (all EA)
• Full address (street, type, number,
  neighbourhood)
• Responsible person name
• Total of persons living in
• Persons (10 sample)
• Name, sex, age, relationship in the household,
  if lived in at census date

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2000 Census PES

• Data collection
• Starting October 2000 and finishing February
  2001
• 1,356 enumerators, 319 supervisor and 27
  Coordinators
• Matching e Reconciliation
• Clerical matching (2 stages dwelling and
  person)
• 10 in average was sent to reconciliation
• Both done by the same technicians
• The two operations took around 3 months

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2000 Census PES

• Estimation
• Dual System (DSE)
• a found in the Census and PES
• b found in the PES
• c found in the Census
• d NOT found neither in the Census nor in the PES
• t assumed to be population

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2000 Census PES

• Some results

Net undercount rate for dwellings in 2000 Census,
Brazil and Regions
Does not include rural area Does not include
rural area of North region
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2000 Census PES

• Some results

Net undercount rate for persons in 2000 Census,
Brazil and Regions
Does not include rural area Does not include
rural area of North region
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Whats new for 2010

• Bigger sample
• Around 4,000 EA
• Confidence level of 68
• Error 0,10
• Include rural area of North region
• Sampling PPS
• instead of random
• Automatic matching
• Instead of clerical only

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Where we are on the automatic matching

• Methodology
• Study of methodologies and related computational
  methods
• System
• Conducted studies on different possibilities -
  Data Quality (SAS), Quality Stage (IBM), among
  others
• Testing FEBRL

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Thanks