National Child Development Study and 1970 British Cohort Study Technical Report: Changes in the NCDS and BCS70 Populations and Samples over Time

The Centre for Longitudinal Studies (CLS) is one of five centres that comprise the Bedford Group for Lifecourse and Statistical Studies (www.ioe.ac.uk/bedfordgroup). CLS is devoted to the collection, management and analysis of large-scale longitudinal data. It has responsibility for Britain's internationally renowned birth cohort studies, the National Child Development Study (1958 cohort) and the 1970 British Cohort Study, and leads the consortium conducting the ESRC's Millennium Cohort Study. The views expressed in this work are those of the authors and do not necessarily reflect the views of the Economic and Social Research Council. All errors and omissions remain those of the authors.