For simplicity, the summary of the important aspect is "synthetic control analyses consider how state bans on e-cigarette sales to minors influence teen smoking rates. These bans yield a statistically significant 1.0 percentage point increase in recent smoking in this age group, relative to states without such bans."
This same author released a similarly titled paper 2 weeks ago, but that is behind a paywall so I have linked to this one instead from 6 months ago. This paper contains the same important implications that the recent one does, though because I do not have access to the new paper I am unsure of what exactly is different.
New paper here for the curious:
http://www.sciencedirect.com/science/article/pii/S0167629615...
