The dataset was derived from childhood waves of the 'National Child Development Study' (NCDS - available from UKDA under GN 33004), during the course of a project funded by the ESRC's Health Variations Programme, titled 'Income Dynamics and Health Inequalities'. One of the major aims of this project was to explore the role of income in generating health inequalities within a life course perspective. The influence of family income in childhood on later health outcomes, therefore became one of the central focuses of the study. For the second edition (August 2008), the serial number has been replaced with a new one, variable Ncdsid. This change has been made for all datasets in the NCDS series. Further information may be found in the ‘CLS Confidentiality and Data Security Review’, included in the documentation. The dataset contains the following variables:ncdsid - serial numberp-faminc - predicted log permanent family income (Wave 3)data-3 - valid data wave 3 of surveydata-2 - valid data wave 2 of surveydata-1 - valid data wave 1 of surveydata-0 - valid data birth survey