Fig. 3From: Youth smoking and anti-smoking policies in North Dakota: a system dynamics simulation studySimplified stock-and-flow diagram of smoking behavior. Experimenters: smoked < 100 cigarettes/lifetime. Smokers: smoked ≥100 cigarettes/lifetime; current smokers/experimenters: smoked within past 30 days; ex-smokers: did not smoke within past 30 daysBack to article page