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REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 1
EXPERIENCES OF TURKEY ON EXPERIENCES OF TURKEY ON 2011 POPULATION AND 2011 POPULATION AND
HOUSING CENSUSHOUSING CENSUS
May 22-23, 2012Geneva
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 2
ContentContent
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 methodology4. Main lessons learnt
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 3
Registers in TurkeyRegisters 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.
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 4
ABPRS Population ResultsABPRS 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)
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 5
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
2011 Population And Housing Census2011 Population And Housing Census
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 6
• 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
2011 Population And Housing Census2011 Population And Housing Census
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 7
Registers NAD
-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)
TOPICS TOPICS COVERED COVERED
IN THE IN THE CENSUSCENSUS
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 8
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.)
2011 Population And Housing Survey2011 Population And Housing Survey
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 9
• 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)
2011 Population And Housing Survey2011 Population And Housing Survey
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 10
Field applicationField 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%
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 11
Household Application Application in Institutional Places
Controlling the registers in ABPRS
Interview with households(Netbook+paper based questionnaire)
Application of questionnaires(paper based questionnaire)
Stage 1. Controlling the addresses
Stage 2. 2011 Population and Housing Survey Field Application,October-December, 2011
Controlling the addresses in sample enumeration areas
September, 2011
Controlling the addresses of institutional places
April-July, 2011
Stages of the field applicationStages of the field application
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 12
Data processingData processing
On line
ReportsProductionDatabase
TurkStat Regions
Analyis of data
Backup unit
Firewall
Web Services
Web Services
Face t
o face
Face t
o face
with ques
t.
with ques
t.
Form DForm Dcontrolcontrol
Face to
face w
ith
Face to
face w
ith
Notebook
Notebook
Daily
bac
kup
Daily
bac
kup
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 13
Monitoring field applicationMonitoring 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.
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 14
• 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
Registers Used In CensusRegisters Used In Census
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 15
Quality Control Study (CQS)Quality Control Study (CQS)• 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
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 16
• 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
AAdvantages of the Methodologydvantages of the Methodology
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 17
• 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
Disadvantages of the MethodologyDisadvantages of the Methodology
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 18
Lessons LearntLessons 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
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 19
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
Lessons LearntLessons Learnt
REPUBLIC OF TURKEYTURKISH STATISTICAL INSTITUTETurkStat
Population and Demography Statistics DepartmentPopulation and Migration Statistics Team
04/22/23 20
Thank you for your Thank you for your attention…attention…