One appendix provides a detailed discussion of the sample design and estimation procedures used for the National Survey of Parents and Youth (NSPY), an in-home survey designed to represent youth living in homes in the United States and their parents. It includes descriptions of the multistage stratified sample design used to select youth and their parents for the evaluation; the procedures used to construct sampling weights and related replicate weights for analysis and calculation of sampling errors; and the procedures used to calculate confidence intervals, rules for data suppression, and design effects for selected statistics. The second appendix describes the data collection methodology used during the initial recruitment phase (waves 1 through 3) and the followup phase (waves 4 through 9) of the evaluation. The third appendix describes the methodology for confounder control, which involves describing the dose-response relationship, where the dose is a unit of exposure to antidrug advertising, and the response is the outcome measure. The fourth appendix describes the advertisements shown to NSPY respondents in waves 1 through 9. The fifth appendix discusses the construction of exposure indexes for both youth and parents, as well as outcome indexes and a risk score index for youth. The sixth appendix presents the NSPY round four questionnaires (waves 8 and 9).