Utilizing Administrative Data for Census 2021: Insights and Strategies
Providing a comprehensive overview of the historical use of administrative data for census purposes, this content delves into methodologies adopted in previous censuses, such as hand-delivery, online attempts, and administrative data enrichment. It also outlines plans for the 2021 census, focusing on online development, under-coverage mitigation, and leveraging additional administrative records for more accurate population estimates and quality assurance. Various administrative sources and coverage aspects, along with innovative proof of concept strategies like using health card activity for population estimates, are explored for enhancing census data accuracy.
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Use of Administrative Data for Census 2021 M ire Brolly
Up to & Including 1991 Hand deliver / collect Persons present No adjustment for under coverage Similar to current RoI Census
2001 UK-wide Methodology & Processing Hand deliver / post back Under coverage One Number Census Census Coverage Survey (CCS) Estimated under-enumeration Imputed households and people added 4.8% people
2011 Post out / post back First attempt at online 15% Under coverage Administrative data - Census Under- Enumeration (CUE) CCS & household and person imputation
Northern Ireland 2011 Census Census Count Census Estimate 1,653,000 1,810,900 157,900 people added to Count (8.7%) 67,700 Health Card Register (CUE) 90,200 Coverage Survey
Plans for 2021 Predominantly Online Development of 2011 methods for under coverage Use more administrative data Add in more records
Other uses of admin data in 2021 Address register Enumerator intelligence Hard to Count measures Supplement Census returns Targeted Follow-up Quality Assurance
Administrative Sources & Coverage Age 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 Births Child Benefit School Census Students at University Health Other Benefits Electoral Register
Administrative Data Population Estimates Proof of concept Health Card Activity 24 months Births used as estimate for 0 & 1 year olds Adjust address of university students - Move from home address to term-time address No other modifications
Persons Northern Ireland 30000 25000 20000 15000 Census Estimate 10000 5000 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Persons Northern Ireland 30000 25000 20000 15000 Census count Census Estimate 10000 Census count is 8.7% lower than Census Estimate (undercount) 5000 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Persons Northern Ireland 30000 25000 20000 15000 Census count Census Estimate ADPE 10000 ADPE 1.2% lower than Census Estimate 5000 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
ADPE & Census Count (Northern Ireland) 5% 0% 0-4 5-9 10-14 15-19 20-24 25-29 30-34 35-39 40-44 45-49 50-54 55-59 60-64 65-69 70-74 75-79 80-84 85-89 >90 -5% CC % -10% -15% -20%
ADPE & Census Count (Northern Ireland) 5% 0% 0-4 5-9 10-14 15-19 20-24 25-29 30-34 35-39 40-44 45-49 50-54 55-59 60-64 65-69 70-74 75-79 80-84 85-89 >90 -5% ADPE % CC % -10% -15% -20%
Useful links Northern Ireland Census http://www.nisra.gov.uk/census.html 2011 Methodology Overview http://www.nisra.gov.uk/archive/census/2011/methodology/overview.pdf Census 2011 - CUE http://www.nisra.gov.uk/archive/census/2011/methodology/under-enumeration.pdf Census 2011 - Ireland and Northern Ireland http://www.cso.ie/en/media/csoie/releasespublications/documents/population/2011/Cen20 11IrelandNorthernIreland.pdf Census 2021 - Planning & ADPEs http://www.nisra.gov.uk/census/2021/planning/reports-and-publications.html Email: maire.brolly@dfpni.gov.uk
Gender Activity & Census Estimate (Antrim) >90 85-89 80-84 75-79 70-74 65-69 60-64 55-59 50-54 45-49 40-44 35-39 30-34 25-29 20-24 15-19 10-14 5-9 0-4 2500 2000 1500 1000 500 0 500 1000 1500 2000 2500
Active Patients Person is alive and living in Northern Ireland in June 2011 AND had an interaction with the Health Service a prescription or dental treatment or NHS Optician treatment or changed their details on the register or had an Accident & Emergency visit or had an Admission or Discharge to Hospital June 2009 June 2010 June 2011 24 months
