Key issues in the quality assurance of the One Number Census

Area of Science:

• Demography
• Statistical Analysis
• Population Studies

Background:

• The 2001 Census in England and Wales aimed to provide accurate population counts.
• Underenumeration is a known challenge in census data collection.
• The One Number Census project was implemented to address these challenges.

Purpose of the Study:

• To examine issues and analyses related to the 2001 Census population counts.
• To assess the effectiveness of the One Number Census project and its Quality Assurance process.
• To validate the robustness of census results for local authority areas.

Main Methods:

• The study involved an assessment of the 2001 Census fieldwork implementation.
• Demographic analyses were conducted on the 2001 Census results.
• Comparisons were made between census population counts and alternative data sources.

Main Results:

• Key issues in the 2001 Census fieldwork were identified.
• Demographic analyses revealed patterns within the census data.
• The One Number Census Quality Assurance process investigated various analytical issues.
• Comparisons with alternative sources supported the plausibility of the census results.

Conclusions:

• The One Number Census project successfully estimated and adjusted for underenumeration.
• The Quality Assurance process ensured robust population counts for local authorities.
• In-depth analyses and investigations provide strong evidence for the credibility of the One Number Census results.