Creating the UK National Statistics 2001 output area classification

The paper describes the creation of the Office for National Statistics 2001 output area classification, which was created in collaboration with the authors. The classification places each 2001 census output area into one of seven clusters based on the socio-economic attributes of the residents of each area. The classification uses cluster analysis to reduce 41 census variables to a single socio-economic indicator. The classification was made available with a host of supporting and descriptive information as a National Statistic via National Statistics on line. The classification forms part of a suite of area classifications that were produced by the Office for National Statistics from 2001 census data. Classifications of local authorities, statistical wards and health areas are also available.