Population Estimates by Single Year of Age, Sex and Ethnic Group for Sub-National Areas in England and Wales, 1991-2001

Although census output from both 1991 and 2001 provides a detailed account of the population by age, sex and ethnic group, accurate analyses of population change for sub-national areas are subjected to four separate problems that make comparisons of populations over time difficult: changes in the population definition, changes in the treatment of non-response, changes in ethnic group classification and age standard outputs, and changes in geographical boundaries for standard census output. A standard methodology has been implemented to overcome these four challenges, and to derive a consistent population time series 1991-2001, with age detail (single year of age or quinary ages), sex and ethnic group. These population estimates are made available using the 2001 Census geography for each district, ward and Output Area in England and Wales. The methods have focused on ensuring consistency with the latest population estimates from ONS for 1991 and 2001.<br> <br> Further information can be found on the <a href="http://www.ccsr.ac.uk/research/PopulationEstimates.htm" title ="Cathie Marsh Centre for Census and Survey Research">Cathie Marsh Centre for Census and Survey Research</a> web page and the <a href="http://www.esrcsocietytoday/esrcinfocentre/viewawardpage.aspx?awardnumber=PTA-163-27-0002" title ="ESRC Award">ESRC Award</a> web page.<br> <br>