1. Maximising the quality of population estimates from the 2011 UK census
Owen Abbott, Garnett Compton, Cal Ghee
30 September 2013

2. Agenda Strategic aim 2001 v 2011 Maximising quality
Hard to count populations
Measuring undercount
Results
Conclusions

3. 2001 evaluation

4. 2011 strategic aim Aim: Maximise overall response
Minimise variation in response
Quality targets:
Overall response rate 94%, AND
All local authorities > 80%

5. 2001  ?
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6. 2011  i
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7. Simulations  

8. Components of strategy
Hard to count index
Questionnaire content and design
Census collection and design
Communications
Coverage assessment

9. Components of strategy
Hard to count index
Questionnaire content and design
Census collection and design
Communications
Coverage assessment

10. Hard to Count
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f2?
f3?
f4?
f5?
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11. Hard to count Index HTC-1 40% of LSOAs (easiest) HTC-2 40% of LSOAs
HTC % of LSOAs (hardest)

12. Census collection
HtC-1
HtC-2
HtC-3
HtC-4
HtC-5

13. Census collection     i
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14. Consistency across areas/HtC
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15. Measuring undercount   

16. HtC HtC age/sex Measuring undercount Coverage survey
Dual-system estimation
Ratio estimation
HtC
age/sex

17. Census response rates, 2001 and 2011

18. 2011 and 2001 response rates, by age and sex

19. i  HtC  Summary   Aim: Maximise overall response
Minimise variation in response
HtC
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