Stats NZ Census Session Introduc2on
How the new 2018 collec2on model worked in prac2ce
Tap to add text PANZ Conference 3
2018 – A new model built on 2018 Census international experience and testing PANZ Conference 4
Four phase collection model 2018 Census Census Day PANZ Conference 5
Prepare : Creating the Dwelling Frame 2018 Census • A list of addresses for all dwellings • The basis for counting dwellings and finding the people in them. • Sources of dwelling information • 2013 Census addresses • Building consents and LINZ data • NZ Post address list • Canvassing Field check before census • Very close to our estimate of dwellings PANZ Conference 6
Prepare: Early Engagement 2018 Census • Pre engagement • Community Engagement • Assisted Completion Events PANZ Conference 7
Te Reo in the 2018 Census 2018 Census • All census letters had bilingual messaging • Respondents completing online could choose to complete in English or M ā ori (and toggle at any time) • 3,000 households in Full Enumeration Bilingual areas • 80,000 households in Delivery with contact areas – Enabled with a call to action letter and then offered a bilingual visit pack – Northland, Rotorua, Hastings, East Cape, Otaki, Chatham Islands PANZ Conference 8
Help and support 2018 Census • 0800 CENSUS • Ran from mid Feb to mid May • Requests for paper and access codes – • Answered census questions • Language options English, Te Reo, Samoan, Cantonese, Mandarin, Korean, Tongan and Hindi • Automated English and Te Reo • Social Media Channels PANZ Conference 9
Internet Collection System 2018 Census • Unique access code for each dwelling address • Built for desktop, tablet and phone • M ā ori and English • Questions matched paper forms • Smart routing • Reuse of respondent entered data • As you type capability • A household summary page to list occupants • Feedback was generally positive • No significant outages during operation PANZ Conference 10
Household Summary Form 2018 Census PANZ Conference 11
Delivery approaches 2018 Census 83% 17% PANZ Conference 12
Delivery Census letter delivered to your letterbox or 2018 Census doorstep CENSUS DAY Visit Delivery Remind x Early Visit PANZ Conference 13
Targeted Strategies – a face to face approach 2018 Census • Targeted People or Area Strategies • Delivery with attempted contact • Delivery with attempted contact bilingual • Early Visit • Full enumeration bilingual • Homeless strategy • Remote rural • Remote islands • Freedom campers, Marinas, Cruise Ships PANZ Conference 14
Remind 6 th – 16 th March 2018 Census • Reminder letters were sent to most non responding mailable dwellings – arriving on 9 th and 12 th March • Early visit teams began delivering paper • Non private dwelling teams collected materials • Community Engagement teams continued promoting the census PANZ Conference 15
Non Response Follow Up 16 March – 30 April 2018 Census • A knock at the door and delivery of paper forms • Return visits if no response • Anticipated 70 percent response by this time • Sub national variability PANZ Conference 16
Field Staff 2018 Census • Field staff had tablets • Online training and support • Workloads on tablets each day • Lists of addresses and maps • Dynamic Workload Allocation Tool (WCAT) • Developed in partnership with Auckland University • Packaged addresses into workloads • Efficiency and flexibility • As responses received non response workloads updated PANZ Conference 17
Recruitment and contracts 2018 Census • Specialist recruitment company • Expertise in performance management, payroll and health and safety • Phase based employment for canvassing, delivery, remind, visit • 30 hour contracts • Living wage pay rates • Most interaction with non respondents PANZ Conference 18
Recruitment challenges 2018 Census • We struggled to get enough staff in some places • Using a third party may have disconnected traditional staff base • Difficult to accommodate a census role around another job • Lost some skilled Census people especially in remote and rural communities • Overhead of technology made getting staff trained and provisioned and active slow PANZ Conference 19
2018 Census
When response wasn’t tracking well 2018 Census • Sent additional reminder letters • Reminder 3 and 4 • Mailing paper forms • Extra advertising • Extended field hours and numbers • Extended engagement • Flying squads – redeploying staff • Assisted Completion events in low response areas PANZ Conference 21
Challenges of the new model 2018 Census We made it hard for people who wanted or needed paper • The public had to phone and ask for it • It took a long time for us to deliver paper if they hadn’t requested it – Remind phase was letter based – Delivery of paper didn’t start until 10 days after Census day in most areas We didn’t get back to visit early enough in low responding areas • Recruitment challenges in some areas • Higher than anticipated non response in some areas • The later we visited the less effective it was • Smaller field team – limited ability to respond to lower than PANZ Conference 22 expected response
Challenges of the new model In some cases we visited dwellings that had already responded • Timeliness and accuracy of receipting responses varied • Dwelling frame addresses didn’t always match respondents self described addresses which sometimes caused duplication and confusion • Shared mailboxes and rigid document IDs caused pain Communication Campaign was effective for main messages • Awareness of census – didn’t always translate to participation • Hard to communicate with respondents in small area based collection strategies PANZ Conference 23
How people are counted in the 2018 Census Use of administra.ve data to count people who were missed by census field collec.on
Outline � Introduction � How we decide which admin records should be included � Assessment
Census-taking is evolving Census aims: Count everyone once, only once, and in the right place Wide variation in methods across countries recognised by the UN Statistical Commission (the peak body for official statistics) � A ‘ full field enumeration ’ (traditional) census asks everyone to fill in forms. • This is what we set out to do in 2018 � A ‘ register-based ’ census uses only admin sources � A ‘ combined ’ census uses a mix of admin sources and field collection • This is what we have produced for 2018
Coverage: How many people should census count? NZ residents in NZ on Aim Es.mated by census night Post-Enumera.on Survey - PES Difference Net census undercount Interim es.mates for 2018, DSE Achieved Census count Census form Non-respondents responses
How people are counted in the census Missed Real people 89% Real people 11% 2018 Census Approx 1.2% Census forms Admin sources Missed Real people 95% Imputed 5% 2013 Census 2.4% +/- 0.5% Unit PES measure Census forms Imputa.on
2018 Census counts – individuals (June 2019) Percent of Source Number census file Early approxima.on of 2018 census Aim 4,760,000 usual resident popula.on (1) Total counted from census forms 4,175,000 89% 3,972,000 Census forms - Individual Forms received 85% - Individuals listed on Household 203,000 4% form Admin sources 525,000 11% Census usually resident popula.on Achieved 4,700,000 100% count Indica2ve Number 59,000 coverage gap 1.2% Percent 1) April 2019. Revised 2013 base ERP, using new 12/16 external migra.on measure
How we use admin data to add people to the census dataset
2018 Census: Separate data sources Admin resident Census Forms population People People Individual Forms Household listing Age, sex, other variables place Age, sex, other variables place Characteristics Characteristics
Combining census forms and admin data Admin popula.on Census forms Some of these admin records are added to the census file to count people who were missed
Admin NZ resident population – the IDI-ERP Estimate of the NZ resident population using linked admin data Begin with IDI spine (‘ever-resident’) • Include all individuals with activity in admin data sources (tax, health, education, ACC) within the previous two years • Remove individuals • who died before reference date • who migrated overseas before reference date
Quality of IDI-ERP admin population: strengths The IDI-ERP is a good approximation of the NZ resident population Detailed examination of time series 2006 to 2016. 2016: Age/sex, 2017: geographies, 2018: ethnicity Experimental population estimates from linked administrative data: methods and results Stats NZ website. Data series and methods papers
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