Transcript DATA EVALUATION METHODS USED IN THE PREVIOUS CENSUSES POST ENUMERATION AND DEMOGRAHIC ANALYSIS Gebeyehu Abelti Deputy Director General, Population & Social Statistics Central Statistical Agency Of Ethiopia Presented.

DATA EVALUATION METHODS
USED IN THE PREVIOUS CENSUSES
POST ENUMERATION AND
DEMOGRAHIC ANALYSIS
Gebeyehu Abelti
Deputy Director General, Population & Social
Statistics
Central Statistical Agency Of Ethiopia
Presented at United Nations Regional Workshop on the 2010 World
Programme on Population and Housing Census: Census Evaluation
and Post enumeration
Addis Ababa, 14-18 September, 2009
OUTLINE
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INTRODUCTION
CENSUS UNDERTAKING IN ETHIOPIA
POST ENUMERATION SURVEY
DEMOGRAPHIC ANALYSIS
CONCLUSION
1 INTRODUCTION..
 Ethiopia is Federal state sub-divided
into Nine Regional States and Two
Administrative Urban Areas ;
 Regional States are further subdivided into 78 zones and Over 600
weredas (districts),
 Overall, in 11 Regional States there
are about 15,000 rural and urban
kebeles.
1 INTRODUCTION..
ADMINISTRATIVE HIERARCHY IN ETHIOPIA
FEDERAL
REGION
ZONE
WEREDA
KEBELE
2 CENSUS UNDERTAKING IN ETHIOPIA
 So far, the country has conducted only three
National Population and Housing censuses :
The First ever Population and Housing
Census was conducted in May 1984 (39.9
million);
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The Second Population and Housing Census
was conducted in October 1994 (53.5 million);
 The third/Latest PHC was conducted in May
and November 2007(73.9 million).
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2 POST ENUMERATION SURVEY
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PES was conducted only once;
PES was undertaken in 1994 two months after the
enumeration;
Pre-test before the PES was carried out in 13 EAs;
The general objective of the PES were to measure coverage
and content errors of the 1994.
The specific objectives were:
a) Evaluation of the accuracy of the PHC results in terms of
coverage and content (response quality) for selected
characteristics;
b)Identification of procedural and conceptual improvements
needed for undertaking PHC in the future. Source and
causes of coverage and content errors from the census
enumerators and respondents perspective.
c) Evaluation of the quality of the census enumeration areas
as sampling units for inter-censual surveys.
2 POST ENUMERATION SURVEY…
UNIVERSE AND SAMPLE DESIGN
 The universe defined for the 1994 PES was the
population
living
within
a
conventional
household in the country excluding Afar and
Somalie Regions.
 More over, residents of collective quarters and
homeless persons were excluded from the
survey.
 The survey was designed to provide reliable
estimates of the census coverage error for the
whole country and for six major geographic
domains.
 The sample design was a stratified cluster
design and EAs were the sampling units.
2 POST ENUMERATION SURVEY…
 Formation of the six domains was based on the
administrative division of the country.
 Out of the six domains, three were composed
of one administrative region each;
 The remaining three domains were formed by
combining two neighboring administrative
regions which are assumed to have similar
ecological, cultural and social features.
 A total of 290 EAs were selected for the PES.
 Concerning field activities data collection was
carried out at two different periods:
2 POST ENUMERATION SURVEY…
 First period was November 1994 three weeks
after enumeration;
 The second period was during the last two
months of December 1994.
 Due to limited logistical and manpower because
National Agricultural Sample Survey was
planned to be carried immediately after PHC.
 Some enumerators and supervisors were
selected from the PHC and the remaining from
CSO’s permanent field staff.
 Enumerators-supervisors ratio was three to
one where as in main census it was five to one.
2 POST ENUMERATION SURVEY…
Matching and Reconciliation Visits
 Manual matching of PES data with the
corresponding census data was done at various
stages:
 Matchers;
 Supervisors and semi-professionals;
 Senior technicians and professionals.
 Reconciliation visits were conducted to make
the coverage evaluation complete, to resolve
issues not clearly determined during matching.
2 POST ENUMERATION SURVEY…
 The PES report was prepared two years after the
field work;
 The of PES has not been officially released for the
public.
 In the report it has been indicated that at national
level older and rural population were less omitted
by the census than their counter parts.
 Estimates of coverage and content errors were
made but not communicated to the public.
3 Census Data Evaluation through
Demographic Analysis
 Demographic analysis has been commonly used
to evaluate the census data in the previous
censuses and planned to be also used for the
current as well.
 The country has no vital registration system, did
not conduct a PES for all censuses but 1994 and
hence, demographic analysis has been found to
be an important tool for the overall assessment
of census data quality.
 Age-sex pyramid, summary indices such as
Whipple’s Index and Meyers’ Index were
commonly used to assess the census data.
 Comparisons of the recent census results with
the previous census and with the projection
results were also used to evaluate the census
data.
4 CONCLUSION
 PES was NOT conducted for the 2007 PHC
due to the fact that two census dates were
adopted: one for the regions with the sedentary
population and another for the pastoral regions;
 Since the preparatory activities of the second has
begun immediately after the first enumeration
was completed and hence, it was not possible to
get adequate manpower and time as well to
carry out an independent PES;
 Lack of experience. Because few staff members
who were involved in the previous census have
left the office due to different reasons;
4 CONCLUSION…
 Using demographic analysis, so far no separate
census data evaluation report was prepared.
Instead, the analysis of data quality used to have
been provided for some variables as part of the
analytical reports.
 However, there is an increasing concern about
information on the extents of the coverage and
content errors from the data users.
 The importance of conducting PES for the next
census has been underlined by the Census
Commission in order to be able to furnish the
information.
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