Post Enumeration Survey- 2000 Census

1. Post Enumeration Survey- 2000 Census Presented By Batista Chilopa Central Statistical Office Zambia

2. DATES • Census 2000 dates: 16th October 2000 to 30th October • PES Date: 23rd February 2001 for three weeks • At least three months after the Census Enumeration

3. OBJECTIVES • To Present census data to users with results of quantitative evaluation of the accuracy of the census data • To identify the extent of over-coverage or under-coverage of population at all levels including; National ,rural, urban and province.

4. OBJECTIVES Continued • To identify levels of agreement for responses related to questions on sex, relationship to head of household, marital status age and type of housing units • To identify areas of improvement for future censuses

5. PREPARATORY ACTIVITIES • Identified Key Survey Personnel/Planning team: • Survey coordinator • Sampling Statistician • Field Coordinators • Data Processing Specialist • Data analysts • All were Central Statistical Office Personnel

6. PREPARATORY ACTIVITIES Cont’ • Decided on level of aggregation and sample size -National Level -Sub-national Levels -Provinces, Rural & Urban -250 EAS • Calculated the number of interviewers required and days needed in the field • Established a work plan • Estimated Budget (part of the National Census Budget)

7. PREPARATORY ACTIVITIES Cont’ • Preparation of instruments • Questionnaires • Interviewer’s Manual • Supervisor’s Manual • Matching Instructions • Field re-visit instructions • Pretest and Pilot preceded main fieldwork

8. RECRUITMENT OF FIELD STAFF • All Enumerators did not participate in Census enumeration (regular CSO Staff & School Leavers) • Some supervisors had taken part in census • All trainers and field coordinators had taken part in census

9. TRAINING • Enumerators training manual was prepared • Training took 1 week • Central training • Supervisors & Enumerators trained together • Training manual for supervisors was also available –Last day of training for supervisors

10. SAMPLING DESIGN • Stratified cluster sampling • Sample size determination based on previous experience 1% of the total population • Stratification: Provinces, Rural and Urban • 250 Primary Sampling Units selected with probability proportional to size (pps) • All selected Clusters were to be covered on 100% basis (institutionalized population was not covered)

11. FIELDWORK • Trainers & field coordinators observed initial implementation of fieldwork • Every Supervisor was assigned three enumerators • Supervisors remained in the field through out • Fieldwork ran for three weeks

12. MATCHING EXERCISE • Matching was done manually using procedure C (matching non-movers & out-movers only) • A case-by-case comparison of Census records with that of the PES after data collection • Pairing each household and each person in PES with the corresponding Census records

13. CASES FOR FIELD RE-VISITS • A number of individuals were found in the census but not in PES and vice versa • Entire PES enumeration Area (EA) failing to match with respective Census EA even when the geographical IDs matched

14. Field Re-visit • Follow up visits for un-matched households and individuals were made • To allow for identification of erroneous census enumerations and resolve some doubtful cases • A reconciliation exercise in the office was conducted afterwards and data entered

15. Data Analysis • The match rate generated after all the needed reconciliations was only about 70%. • There was a huge PES population that had non-match status code • The office was prompted to seek technical assistance through UNFPA

16. TA recommendations • All cartographic maps that did not benefit from the pre-enumeration up-dates needed to be reviewed to assess their usefulness by the PES Enumerators. • All PES EAs that were updated in the field during the census should also be reviewed, with the aim of assessing their application by the PES enumerators. • .

17. TA recommendations Cont’ • Households should be matched before individual matching i.e person matching should be undertaken only for matched households • Cases where households in the whole SEA do not match should be assumed the PES enumerator is covering the different geographic area and the solution can only be possible by field work. • Effort should be made; including relaxing rules so that the match rate is raised to more than 80 percent.

18. TA Recommendations Cont’ • The PES team should be involved in the data processing activities-formulas should be discussed with the data processing team before application. • Data should be exported to SPSS and eventually excel which the PES team is familiar with which will be of great use when estimating content error and also help in checking input. • Due to technical and financial constraints not all recommendations by the TA were implemented • The office decided to compile only an administrative report

19. Lessons Learnt • Pre enumeration cartographic works should be completed by the time of Census • Questionnaire formats for both PES and Census should be similar to ease the matching • Electronic matching should be considered • Timely flow of resources is required • Implementing appropriate time frames

20. THANKYOU !