Transcript REPUBLIC OF TURKEY TURKISH STATISTICAL INSTITUTE TurkStat EXPERIENCES OF TURKEY ON 2011 POPULATION AND HOUSING CENSUS May 22-23, 2012 Geneva Population and Demography Statistics Department Population and Migration Statistics.

REPUBLIC OF TURKEY
TURKISH STATISTICAL INSTITUTE
TurkStat
EXPERIENCES OF TURKEY
ON 2011 POPULATION
AND HOUSING CENSUS
May 22-23, 2012
Geneva
Population and Demography Statistics Department
Population and Migration Statistics Team
06.11.2015
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REPUBLIC OF TURKEY
TURKISH STATISTICAL INSTITUTE
Content
TurkStat
1. Registers in Turkey
2. 2011 Population and Housing Census
.Census model, application period, application
method,
. Topics covered in the survey
. Field application
. Data processing
. Registers used
. Quality control study
.Monitoring the field application
3. Results of this methodology
4. Main lessons learnt
Population and Demography Statistics Department
Population and Migration Statistics Team
06.11.2015
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REPUBLIC OF TURKEY
TURKISH STATISTICAL INSTITUTE
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Registers in Turkey
• National Address Database (NAD) which covers all addresses
within the boundaries of the country with unique identification
number established in 2006.
• Address Based Population Registration System (ABPRS) covering
information on usual place of residence of all people living in
the country established in 2007.
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TURKISH STATISTICAL INSTITUTE
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ABPRS Population Results
• Population results refering 31 December based on the new system
are announced to the public every year in January.
– Population by localities (province, district, sub-district and
village)
– Age and sex structure,
– Internal migrations,
– Legal marital status,
– Place of registration,
– Educational status,
– Nationality of persons living in Turkey (Turkish citizens and
foreigners)
• All information is available on the web site (www.turkstat.gov.tr)
Population and Demography Statistics Department
Population and Migration Statistics Team
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REPUBLIC OF TURKEY
TURKISH STATISTICAL INSTITUTE
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2011 Population And Housing Census
2011 PHS was conducted in order to obtain the information nationally
needed and internationally recommended on demographic, social,
economic and housing characteristics of the population.
•Census Model:
Combined model was used (by using
population registers and by conducting a big
sample survey)
• Application Method: Face to face interview with netbooks (CAPI)
and by using paper based questionnaires
• Application Period: October-November, 2011
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Population and Migration Statistics Team
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REPUBLIC OF TURKEY
TURKISH STATISTICAL INSTITUTE
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2011 Population And Housing Census
• Main purpose of conducting a survey is to obtain information that
are not available in the ABPRS, other administrative registers and that
can not be obtained from regular household surveys in province and
district level.
•Registers were used to provided data about at least some basic
population topics, determining the address frame, reducing response
burden and to improve the quality of the census information
Population and Demography Statistics Department
Population and Migration Statistics Team
06.11.2015
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TURKISH STATISTICAL INSTITUTE
NAD
Registers
TOPICS
COVERED
IN THE
CENSUS
TurkStat
-population size
-age and sex structure
-legal marital status
-place of birth
-literacy and educational
attainment
-size of households
-relationship between
household members
-births
-deaths
Defining enumeration areas
Selecting sample enumeration areas
TOPICS INCLUDED IN QUESTIONNAIRE
-Building and housing characteristics
-Marital status
-Place of usual residence one and five years prior to the census
-Reason for migration
-Ever resided abroad and year of arrival in the country
-Disability
-Literacy and educational attainment
-Attendance to pre-primary/pre-school/kindergarten
-Labor force status
-Fertility
-Deaths (infant, child and adult)
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TURKISH STATISTICAL INSTITUTE
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2011 Population And Housing Survey
A big sample survey of about 2.4 million households (approximately 12,7%
of the total households) conducted in 4.119 localities (948 province and
district centers, 3.171 villages)
Complete enumeration of institutional places (military barracks,
university dormitories, nursing homes, prisons, orphanages, etc.)
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REPUBLIC OF TURKEY
TURKISH STATISTICAL INSTITUTE
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2011 Population And Housing Survey
• Enumeration areas were defined on National Addres Database including
approximately 100 inhabited dwellings (dwellings in which persons
registered in ABPRS)
• Out of 195.192 enumeration areas 22.861 sample enumeration areas
were selected (11,7%)
9.438 enumeration areas (in province and district centers)
3.423 enumeration areas (in village)
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Field application
• Approximately 3.600 enumerators, 383 supervisors and responsible
persons for each region, province and district were charged
• 6.2 million addresses were enumareted
• 8,5 million persons were interviewed
• Non-response rate was 7,2%
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Stages of the field application
Stage 1. Controlling the addresses
Controlling the addresses in
sample enumeration areas
September, 2011
Controlling the addresses of
institutional places
April-July, 2011
Stage 2. 2011 Population and Housing Survey Field Application,
October-December, 2011
Household Application
Application in Institutional Places
Controlling the registers in ABPRS
Application of questionnaires
(paper based questionnaire)
Interview with households
(Netbook+paper based questionnaire)
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Data processing
Form D
control
Analyis of
data
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Regions
Web
Services
Reports
Production
Database
Firewall
Daily backup
Web
Services
On line
Backup unit
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Monitoring field application
• Daily and weekly reports were taken from central system to
monitore the field application,
• Simultaneous web based consistency check reports visualised
to the Regional Offices during the field application for
approvement,
• Field data were checked with administrative records (MERNIS,
etc.) and sent to RO for approvement
• Mail group was created to communicate with field staff.
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Registers Used In Census
• NAD (National Address Database) was used as an
address frame
• Address Based Population Registration System
(ABPRS) was mainly used to avoid multiple records to
reduce response burden
– personal Id numbers
– name/surname, sex, date of birth etc.
• Central population registration System (MERNIS) and
social security records were used to improve the quality
of the census information
– Birth records
– Death records
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Quality Control Study (CQS)
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Quality Control Study of 2011 PHS was carried out in November and December,
Purpose: To evaluate the data quality of PHS in terms of calculating the content
errors based on basic variables.
Approximately 5% of the sample enumeration areas from the respondent PHS
enumeration areas
– In 511 localities, 1.108 enumeration areas were interviewed
– All addresses in the selected enumeration areas were interviewed
– Matching ratio between PHS and QCS over individual identification
numbers is around 92%
The CQS interview in the field was carried out independently from PHS
The supervisors in the CQS were from the central office
The reliability indicators will be reported on the basis of each variable asked in
CQS
In the analysis, inconsistency index, net and gross difference rate, rate of
agreement indicators will be calculated
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Advantages of the Methodology
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The number of field staff needed for collecting data was less
than 2000 Population Census. This created advantage in
terms of budget, quality of staff and controlling the field
operation and logistics
Netbook usage(CAPI) provided some cross checks between
answers at the time of interview. Checks in the program
increased the data quality
Netbook usage for data capture created time efficiency
compared to other methods (ICR, manual data entry)
By the online data transfer which allowed enumerators sent
data to the main system, field application can be monitored
daily through central web based system
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Disadvantages of the Methodology
• Because it was the first time to use this methodology it was a
challenge in terms of lacking of experience
• Because the data collection period is quite long (2-3 months) the
gap between the reference date increased
• National Address Database has some problems in terms of building
codes identifies buildings. This was a challenge for creating checks
in the netbook program
• In some regions finding the addresses in the field was still a problem
that NAD is not updated regularly by the municipalities
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Lessons Learnt
• Duration of data entry program testing should be longer and further
program testing procedures should be applied
• A long term period program should be implemented for choosing
and training of the field staff
• Geographical Information Systems(GIS) should be used for creating
enumeration areas on orthophotos
• Duration of the field application period should be shorter
• Administrative registers should be used during the field application
to check the quality of the data(simultaneously from the beginning to
the end of the field application)
• Organization of the institutional places should be completed earlier
and the field application should be completed in 1 week. Instead of
manual data entry of regional offices, each institutional place can
realize own data entry on a web based program
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06.11.2015
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Lessons Learnt
Plans for the next census:
• fully register based
• analyzing stages should be tested in advance
• quality control study should be done according to a
scheduled program
• integrating the current surveys with registers should be
warranted and new thechniques should be explored
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Population and Migration Statistics Team
06.11.2015
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REPUBLIC OF TURKEY
TURKISH STATISTICAL INSTITUTE
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Thank you for your attention…
Population and Demography Statistics Department
Population and Migration Statistics Team
06.11.2015
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