The Differential Impact of the 2000 Canadian Graphic Warning Label Policy on Smoking Prevalence by Sex and Education: A Difference-in-Difference-in-Difference Model
Bukola Usidame; Gang Meng; James F Thrasher; Mary E Thompson; Geoffrey T Fong; Nancy L Fleischer · 2022 · Nicotine & Tobacco Research
WASTE classifies this as Negative / Null Result Report · AI classification, approximate
The study found no significant effect — useful as a negative control or null benchmark for your own design.
Abstract (excerpt)
Abstract Introduction Using a quasiexperimental design, we compared the impact of the 2000 Canadian introduction of graphic warning labels (GWLs) on differences in smoking prevalence by sex and education, to the United States, where no…
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Metadata source: Crossref · DOI 10.1093/ntr/ntac122