Placeholder. Diaper trust-building strategies split cleanly along cultural lines: the West relies on lab certifications (OEKO-TEX, EWG, Dermatest), Korea relies on a 26-year-running government-adjacent brand-power index, and China increasingly relies on founder credentials and social-platform education rather than any certification badge at all.
What we've found so far: Korea's K-BPI index has ranked Huggies #1 for consecutive years; China's '五个女博士' (Five PhD Women) brand builds trust through founder-credential content rather than certification; the US/EU lean on third-party lab marks.
Open research: Build a comparative matrix of trust mechanisms across all 12 markets researched; identify which mechanism correlates most with actual purchase behavior via any available survey data.