The Department of Health and Ageing (DoHA) commissioned AIHW to undertake this study to investigate and document the scope, feasibility and utility of setting up a Carers National Data Repository (CNDR). The CNDR is conceived as a way of improving the evidence available about carers using existing data which would mitigate issues arising from scattered evidence by bringing data together, standardising metadata and analysing data in more integrated ways (including through the use of data linkage) to inform important policy and research issues.