Fig. 1. Loess curve of association between brand-specific advertising exposure (adstock) and prevalence of brand consumption among underage drinkers ages 13–20. This figure shows the relationship between brand-specific advertising exposure (adstock) and the prevalence of youth alcohol brand consumption over the range of advertising exposure revealed through the survey. Adstock units represent a measure of cumulative exposure in the month a youth participant completed the survey and the preceding months, with an advertising half-life of one month. The loess curve uses a smoothing function to visually demonstrate the relationship between the two variables. From: The Relationship Between Population-Level Exposure to Alcohol Advertising on Television and Brand-Specific Consumption Among Underage Youth in the US Alcohol Alcohol. 2015;50(3):358-364. doi:10.1093/alcalc/agv016 Alcohol Alcohol | © The Author 2015. Medical Council on Alcohol and Oxford University Press. All rights reserved