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Maximising the quality of population estimates from the 2011 UK census Owen Abbott, Garnett Compton, Cal Ghee 30 September 2013. Agenda. Strategic aim 2001 v 2011 Maximising quality Hard to count populations Measuring undercount Results Conclusions. 2001 evaluation. £.
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Maximising the quality of population estimates from the 2011 UK census Owen Abbott, Garnett Compton, Cal Ghee 30 September 2013
Agenda Strategic aim 2001 v 2011 Maximising quality Hard to count populations Measuring undercount Results Conclusions
2011 strategic aim • Aim: • Maximise overall response • Minimise variation in response • Quality targets: • Overall response rate 94%, AND • All local authorities > 80%
2001 ?
2011 www. i
Simulations
Components of strategy • Hard to count index • Questionnaire content and design • Census collection and design • Communications • Coverage assessment
Components of strategy • Hard to count index • Questionnaire content and design • Census collection and design • Communications • Coverage assessment
Hard to Count f1? f4? f2? f5? f3?
Hard to count Index HTC-1 40% of LSOAs (easiest) HTC-2 40% of LSOAs HTC-3 10% of LSOAs HTC-4 8% of LSOAs HTC-5 2% of LSOAs (hardest)
Census collection HtC-1 HtC-2 HtC-3 HtC-4 HtC-5
Census collection www. i
Consistency across areas/HtC
Measuring undercount
Measuring undercount • Coverage survey • Dual-system estimation • Ratio estimation HtC HtC age/sex
Summary • Aim: • Maximise overall response • Minimise variation in response HtC www. i