Post Enumeration Survey for Population Census: Overview and Objectives

1. 2010. 5. 10 Post Enumeration Survey for Population Census Jaewon Lee Statistical Research Institute Statistics Korea

2. Outline of the 2005 PES • PES has been conducted on every 5 years • PES period : 12. 1. ~ 8. (8 days) - Census period : November 1. ~ 15. • Sample size : 730 enumeration areas - 0.27% of total enumeration areas • No. of questions : 15 questions • Data collection method : Face to face interview

3. Objectives of PES • to estimate coverage errors of the population census • to evaluate the quality of answers by measuring levels of agreements between census and PES answers • to improve planning and operations of the census by characterizing missed and erroneously included individuals • to produce information for population, households projection

4. Organizational structure PES Census Planning Vital Statistics Div. Population Census Div. * Trends Analysis Div. in the Statistical Research Institute (2010) Field Management Local Office Local Government

5. Recruiting for enumerators • Enumerators of PES : Well- trained field staff in the local office of Statistics Korea (730 people) • Enumerators of the Census : temporary hired people during census-taking periods (105,000 people) • Benefits of using field staff in the local office • Extensive experience in field survey • Produce high quality survey data • Criteria for selection: experience in data collection for household survey

6. Sampling design • Sample size : 0.27% (730 enumeration areas) • 60 households per one enumeration area • Sample size of provinces were allocated using standard errors in 2000 PES and compromise allocation methods • Sampling frame : list of census enumeration areas • Sampling methods • Stratified by the type of enumeration area • Proportionate probability sampling within a stratified list of census enumeration area • Analysis domains : national and province

7. Census Dependent re-enumeration (single system) Information provided to PES enumerators Census map Household list Basic information for household members : name, gender, age, marital status, relationship to the head of the household Enumerators duties Identify/probe all households in an EA boundary Face to face interview Persuade interview refusals Field Work

8. Question for individuals Name, gender, age, marital status, relationship to the head of the households Date moved to the current address, type of individuals (non-mover, in-mover, out-mover, erroneously included, omitted), reason for omission, reason for erroneous inclusion, previous address of in-mover Question for households Types of household, reason for omission, reason for erroneous inclusion, house types Questions for PES

9. Coverage errors in PES

10. Adjust the base population of the population projection by coverage errors Adjust the base household numbers for the households projection Improve future census planning and operations Evaluate census coverage errors Evaluate quality of answers Census figures were not adjusted by PES results Use of PES results

11. Expand sample size from 730 EAs to 3,000 EAs Estimate coverage errors to the city and county level (nation, province, city/county) Intensify independence of PES from the census Produce information to evaluate the registered population General directions for 2010 PES

12. Thank You