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Next steps Apply the SCM to other states that implemented tobacco control programs after California (e.g., Massachusetts, Oregon) Explore heterogeneous effects by analyzing how the treatment effect varies across post-treatment years using rolling-window or recursive estimations Compare SCM estimates with difference-in-differences approaches applied to the same data Investigate conformal inference methods (Chernozhukov et al., 2021) for formal confidence intervals in the SCM framework 12

While the study didnt ask people why they had these perceptions, the researchers have some theories

However, given there is still some confusion between vaping and smoking, it is essential that any packaging requirements make clear the distinction between e-cigarettes and tobacco products. The Department of Health and Social Care was approached for a response.

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