Classification: SEG80
Short name: SEG80
Full name: Socio-Economic Group 1980
General description: Classification by socio-economic group (SEG) was introduced in the UK in 1951; it has been revised several times. Groupings are determined by occupation unit group and employment status in an aim to ‘bring together people with jobs of similar social and economic status’ (1980:xi).
SEG is a non-hierarchical classification of people into one of 20 groups determined by occupation, employment status and number of employees in the establishment (although not explicitly stated in CO80). In 1980 the SEG classification was based on the Classification of Occupations 1980.
It is an unordered classification, unlike the Registrar General's Social Class (RGSC) which is an ordinal one.
Changes in classification of occupation between 1970 and 2000 affect the grouping of occupations within the SEGs, but not the names and codes of the groups themselves.
LS description: The LS SEG variable takes a value between 00 and 19 corresponding to each of the 20 SEG codes.
Keyword: Socio-economic
Start date: Census 1981
References: Classification of Occupations 1980. London: HMSO
Equivalent classifications: SEG90 (Census 2001)
SEG70 (Census 1981)
NS-SEC (Census 1971)