1. Measuring Census Coverage Post Enumeration Survey
Directorate of Surveys Post Enumeration Survey
Measuring Census Coverage
Post Enumeration Survey
The 2000 PES and 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: inhab/km2

3. 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

4. IBGE does not adjust Census results based on the PES
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

5. 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)

6. 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

7. PES does not cover collective dwellings
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

8. 68% confidence level for 0,2 error
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

9. 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

10. 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

11. 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

12. 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

13. 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

14. What’s new for 2010 Instead of clerical only 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

15. 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

16. Thanks