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Statistical weights for the study eligible respondents were calculated using panel base sampling weights to start. Panel base sampling weights for all sampled housing units were computed as the inverse probability of selection from the NORC National Frame (the sampling frame that is used to sample housing units for AmeriSpeak) or address-based sample. The sample design and recruitment protocol for the AmeriSpeak panel involves subsampling of initial non-respondent housing units. These subsampled non-respondent housing units are selected for an in-person follow-up. The subsample of housing units that were selected for the nonresponse follow-up (NRFU) had their panel base sampling weights inflated by the inverse of the subsampling rate. The base sampling weights were further adjusted to account for unknown eligibility and nonresponse among eligible housing units. The household-level nonresponse adjusted weights were then post-stratified to external counts for number of households obtained from the Current Population Survey. Then, these household-level post-stratified weights were assigned to each eligible adult in every recruited household. Furthermore, a person-level nonresponse adjustment accounted for non-responding adults within a recruited household. Finally, panel weights were raked to external population totals associated with age, sex, education, race/Hispanic ethnicity, housing tenure, telephone status, and Census Division. The external population totals were obtained from the Current Population Survey. The weights adjusted to the external population totals are the final panel weights. For further information, see Appendix B of the Report (pp. 27-28)