This document was produced by the authors based on their research for the report "School Completion: What We Learn from Different Measures of Family Background," and is an added resource for further information. This study relies on two main sources to analyse how Year 12 completion is related to disadvantage: the Longitudinal Surveys of Australian Youth (LSAY) and the Youth in Focus (YIF) Project. This appendix provides details on the data used. First, a detailed description of all variables controlled in the regression is provided. These include variables overlapping in LSAY and YIF as well as those unique to each of the sources. Second, the procedure of generating weights in LSAY is described. (Contains 2 tables and 1 figure.) [For the full report, "School Completion: What We Learn from Different Measures of Family Background. Longitudinal Surveys of Australian Youth. Research Report 59," see ED533335.]