9780761973225 | Sage Pubns Ltd, July 29, 2003, cover price $113.00 | About this edition: As a result of a review conducted by the Economic and Social Research Council (ESRC) and the Office for National Statistics (ONS), both previous government social classifications, Social Class based on Occupation and Socio-economic Groups, were replaced in 2001 by a new classification, the National Statistics Socio-Economic Classification (NS-SEC).

9781403996480 | Palgrave Macmillan, November 12, 2005, cover price $120.00 | About this edition: Produced jointly by the Economic and Social Research Council and the Office for National Statistics, this comprehensive report work describes the background to the development of the NS-SEC, including how it was rebased to take account of the new Standard Occupational Classification of 2000.