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EXPERIENCES OF TURKEY ON 2011 POPULATION AND HOUSING CENSUS

EXPERIENCES OF TURKEY ON 2011 POPULATION AND HOUSING CENSUS. May 22-23, 2012 Geneva. Content. 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

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EXPERIENCES OF TURKEY ON 2011 POPULATION AND HOUSING CENSUS

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  1. EXPERIENCES OF TURKEY ON 2011 POPULATION AND HOUSING CENSUS May 22-23, 2012 Geneva

  2. Content • 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

  3. 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.

  4. 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)

  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 bigsample 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 Census

  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 Census

  7. TOPICS COVERED IN THE CENSUS NAD Registers -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)

  8. A big sample surveyof 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 Survey

  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 Survey

  10. 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%

  11. 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)

  12. Data processing Face to face with quest. Form D control Analyis of data Production Database TurkStat Regions Web Services Reports Firewall Web Services Face to face with Notebook Daily backup On line Backup unit Web Dissemination

  13. Monitoring field application Daily and weeklyreports 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.

  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 Census

  15. 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

  16. Advantages of the Methodology • 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

  17. 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

  18. 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

  19. 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

  20. Thank you for your attention…

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