
Research design: Longitudinal
Panel studies: data from samples at 2 or more points in time, for example,
- British Household Panel Survey (BHPS) – objective is to further understanding of social and economic change at the individual sample of more than 5,000 households in Britain with the same individuals re-interviewed in successive waves.
Cohort studies: returning to a sample of participants who are part of the same cohort, for example,
- Millennium Cohort Study (MCS) – follows the lives of a sample of 19,000 babies born between 1 September 2000 and 31 August 2001 in England and Wales, and between 22 November 2000 and 11 January 2002 in Scotland and Northern Ireland.