Earnings are defined relatively narrowly in some surveys, and more broadly in others. A detailed discussion of these concepts including full definitions for different ABS surveys is provided in Labour Statistics: Concepts, Sources and Methods, (Cat. no. 6102.0) and on the ABS Website: www.abs.gov.au.
See ABS Information Paper Measuring Unpaid Household Work (Cat. no. 5236.0) for a full discussion of these several approaches, their technical limitations and the resulting valuations.