The document discusses whether double branding, which is including both the brand and company name together (like "Tide by P&G"), has a small or large effect on advertising. It notes that 82% of print ads use double branding. It then references a quasi-experimental study that found recall was 1.7 times higher for double-branded print ads compared to ads with just the brand name. The document concludes double branding has a large effect based on this evidence.