1. The 2011 Iranian Population and Housing Census
SRTC
The 2011 Iranian
Population and Housing Census
Plans for Census Data Analysis
Z. Rezaei Ghahroodi
Statistical Research and Training Center, Iran.
Needs Assessment Conference on Census Analysis in Asia (NACCA)
23-25 November, 2011

2. SRTC
Outline
Necessity of census time reduction
General specifications
Organization and Geographical map
Pre-tests of the census
Census forms and topics
Data processing and Dissemination
Census evaluation
The most innovations
History of Iranian Population Census
Census goals
Necessity of the census
7th Population and Housing Census
Census data analysis

3. History of Iranian Population census
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History of Iranian Population census
The first full enumeration in Iran was taken in 1956 that almost all of people was enumerated and information on sex, literacy status, economy activity, marital status and housing characteristics was collected.
After next censuses were conducted every 10 years up to 2006.
The 2011 Iranian Population and Housing Census is the first census which is to be implemented on a five-year interval after the previous census in 2006.

4. History of Iranian Population census
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History of Iranian Population census
Census
Year
Date
Total Census
Workers
Population
(000)
1956
1 Nov - 16 Nov
27,607
18,955
1966
30 Oct - 19 Nov
12,885
25,789
1976
29,854
33,709
1986
8 Oct - 22 Oct
55,850
49,445
1996
23 Oct - 16 Nov
61,459
60,055
2006
28 Oct – 22 Nov
91,500
70,496

5. SRTC
Census Goals
The main goals of census is collecting basic information on:
Population characteristics such as age, sex, migration, marital status, economic activity, etc,
Housing characteristics including occupancy status, floor area, etc.

6. SRTC
Necessity of Census
Necessity of census is caused by absence of perfect, exact and update data on population and housing from other sources.
Access to perfect, exact and update data on population and housing
Data processing and getting new information
Knowing the population structure and understanding present needs
Increasing the programming ability to welfare and develop

7. 7th Population and Housing Census
SRTC
7th Population and Housing Census
About the 2011 Iranian Population and Housing Census

8. Necessity of census time duration reduction
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Necessity of census time duration reduction
Large changing in demographic indicators:
population,
fertility patterns,
Immigration and …
Determine development Index in a shorter time interval
Changing provinces geographical boundaries

9. General Specifications
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General Specifications
Census method: De jure
Main sources of census data: Traditional Census
Time: 24 October to 13 November 2011 (21 days)
Data collection method: Face-to-Face interview

10. General Specifications
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General Specifications
The number of
Enumeration Areas: 54,000
Households (estimated): 21,000,000
Households in each EA: 400
The number of
Executors: 115,000
Cities: 1,200
Villages:100,000
This numbers are approximate.

11. Census organization The census organization has 5 main groups as:
SRTC
Census organization
The census organization has 5 main groups as:
Designing group,
Information Technology group,
Supervision and Evaluation group,
Public Relations, publicity and Dissemination group,
Organization and Logistics group.
and some other groups such as “Post Enumeration Survey group” and “Processing and Extraction group”.

12. Designing group Some Functions:
Study and procurement of the population and housing census plan.
Study of international recommendations for population and housing census.
Determination of technical and executive methods of census.
Procurement of technical census forms and manuals.
Preparation of pre-tests plan.
Preparation of the final tabulation patterns.
Procurement of training plan.
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Designing group

13. Information Technology group
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Information Technology group
Some Functions:
Study and assessment of data processing methods in previous censuses and their weaknesses.
Study and assessment of data processing methods in other countries.
Determination of quantity and quality of equipments, requirement, manpower and expenses which required for data capturing.
Procurement of required software.
Preparation of data process plan.

14. Public Relations, publicity and Dissemination group
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Public Relations, publicity and Dissemination group
Some Functions:
Study and assessment of the publicity activities in previous censuses in Iran and worldwide.
Study of all common publicity and advertisement efficiency in Iran.
Procurement of slogan, stamp and several kinds of advertisement.
Assessment of publicity activities in all provinces.
Supervision in publication of census results and information.

15. Organization and Logistics group
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Organization and Logistics group
Some Functions:
Preparation of timetable for group's activities.
Study and Assessment of the executive organization in previous censuses.
Updating and correcting the maps of all the urban and rural areas according to the last division changes.
Preparation of executive organization chart of census.
Determination of executive organization and estimated manpower requirement.
Procurement of necessary supplies

16. Supervision and Evaluation group
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Supervision and Evaluation group
Some Functions:
Preparation of supervision plan.
Supervision and evaluation of activities of all groups, according to the timetable.
Supervision of training, field operation and post-enumeration survey.

17. SRTC
Pre-tests of Census
The 2011 census pre-tests were conducted in two stages:
stage 1 is taken in November 2009 in all provinces for determining data collection method.
Internet Based
Face to Face Interview
Self Completion
Post Based

18. Information Extraction
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Pre-tests of Census
stage 2 is taken in November 2010 in Tehran and 4 other provinces for identifying the probable problems and deficiencies in all stages of census based on face to face interview and ICR system.
Designing Forms
...
Information Extraction

19. Census Forms Iran’s 2011 census forms are:
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Census Forms
Iran’s 2011 census forms are:
4 technical forms or questionnaires:
Form 1 – Listing,
Form 2 – Household Questionnaire,
Form 3 – Institutional Household Questionnaire,
Form 4 – Village Questionnaire,
and some executive or financial forms.

20. Census Topics Demographic characteristics such as:
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Census Topics
Demographic characteristics such as:
Relationship, Sex, Marital status, Birth date and age,
Fertility, Mortality
Migration characteristics such as:
Place of birth, Nationality, Duration of residence,
Place of previous residence.

21. Census Topics Social characteristics such as:
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Census Topics
Social characteristics such as:
Ability to read and write or literacy, Educational attainment, Field of education, Religion, Handicap.
Economic characteristics such as:
Activity status, Occupation, Institutional sector,
Status in employment.

22. Census Topics Housing characteristics such as:
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Census Topics
Housing characteristics such as:
Occupancy status, Number of rooms, Availability of
kitchen, Floor area, Number of occupants, Construction material, Main source of drinking water.
Village characteristics such as:
Type of road, Cultural and health care, Treatment facilities available and centers located in the village, Communication facilities and installations, Services and commercial.

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Data Processing
Data processing is the process of converting raw data into usable information.
The process consists of various successive phases such as data capturing, coding, editing and tabulation.
The choice of an appropriate method of processing is determined by the circumstances of each country.
Raw Data
Usable Information

24. SRTC
Data capture methods
Data capture converts the information obtained in the census to a format that can be interpreted by a computer.
Data capture methods include
Manual Data Entry,
Optical Capture Methods (consisting of the Optical Mark Recognition (OMR)),
Optical Character Recognition (OCR),
Intelligent Character Recognition (ICR),
Personal Digital Assistant (PDA) and the Internet.

25. Coding Coding Methods:
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Coding
Coding is done where a question is open and should be answered as a text (such as occupation).
Coding Methods:
Manual,
Computer-Assisted Coding (CAC),
Automatic Coding (AC),
Combination of above methods.

26. Editing and Imputation
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Editing and Imputation
Raw data files contain errors of many kinds, such as:
errors generated by the respondents
errors caused by enumerators when, for example, they misunderstand the respondents answers
errors caused by data processing operations such as data capture and coding
Editing is an operation that identify invalid and inconsistent responses and corrects or imputes true values.

27. Census Data Dissemination
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Census Data Dissemination
Primary results of the census will be disseminated at the end of Nov 2011.
Descriptive results at total country, provinces and township levels will be ready about 6 month latter.
Census results will be available through website and will published some of them.
The 2 percent file of census data will be available for researchers.
Detailed results for all geographical small areas can be extracted using the new version of Pars software.

28. Census Evaluation Coverage Errors Content Errors
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Census Evaluation
Errors occur at all stages of the census operation and can classified into two categories.
arise due to omissions, erroneous inclusions, or duplications of persons or households
Coverage Errors
arise due to the incorrect reporting or recording of the characteristics of persons or households
Content Errors

29. SRTC
Census Evaluation
Census evaluation is undertaken in order to provide users with a level of confidence when utilizing the data, and to explain errors in the census results.
Numerous methods are available for estimating coverage and content errors of censuses. Demographic analysis and Post Enumeration Survey (PES) are two major methods for evaluating census data.

30. Post enumeration survey
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Post enumeration survey
Objectives:
To Measure under-coverage of persons
To Identify the characteristics of population sub-groups which are more likely for erroneous inclusions
Applications:
Evaluating the coverage error of the census
Discovering the census limitations to improve the future censuses

31. Post enumeration survey
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Post enumeration survey
Method:
Stratified Two-stage Sampling
Stratification variables (Province, Rural/Urban)
PSU: Enumeration Area
SSU: Group of Blocks/Villages within PSU, covering more than 100 households.
Using PPS to select PSU (SSU) within each stratum (PSU)
Sample Size: 618 Enumeration

32. The Most Innovations New items added in 2011 census: National number,
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The Most Innovations
New items added in 2011 census:
National number,
The way that people use the Internet and computers,
The second family residence,
Immigration status from outside to inside,
Event of death in household,
Agricultural Utilization.
Using PDA in enumeration of some urban areas
Coding by combination of AC and CAC

33. SRTC
The Most Innovations
Using new methods of teaching in a Web environment
Performing two pre-tests in 2009 and 2010
Additional controls using the national number
The centralized data processing and software to recognize handwritten Persian Continuous in ICR
Online supervision using the Internet

34. Plans for Census Data Analysis
SRTC
Plans for Census Data Analysis

35. Census data analysis Study on characteristics of Safe dwelling
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Census data analysis
Study on characteristics of Safe dwelling
Study on physical characteristics of private dwellings and its changes during the past periods
Study on Floating population in Iran
Study on foreign immigrants in Iran
Analysis on geographical centralization of foreign immigrants in Iran

36. SRTC
Census data analysis
Study on socio-economic characteristics of foreigners
Domestic migration flows and characteristics of immigrants by provinces
Study on relation of demographic indices and economic development by provinces
Analysis of demographic characteristics by provinces
Analysis of socio-economic characteristics by religion
Study on marriage situation

37. SRTC
Census data analysis
Study on socio-economic and demographic characteristics of ageing in Iran
Study on changes in the average marriage age of females and effective factors on it
Comparison of households welfare indices in Tehran municipality areas
Comparison of social and demographic characteristics in Tehran municipality areas
Study on prevalence disability rate and its relation with the provinces development

38. Census data analysis Having computer and internet access by households
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Census data analysis
Having computer and internet access by households
Analysis on villages socio-economic indices
Analysis of supply and participation rate of labour force by country and provinces
Analysis of the employment status of higher education graduates
Study on human capital in Iran
Study on capital accumulation dynamics in Iran

39. Census data analysis Poverty mapping for Iran
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Census data analysis
Poverty mapping for Iran
Population projection in Iran,
Study on population growth effects on the migration and housing status
Study on relation of urban, migration and province's development indices
Study on education in Iran
Study on female head of households status in Iran
Study on female status in Iran

40. Statistical Research and Training Center
Thank You
Statistical Research and Training Center