Our Northern neighbor, Canada, has faced the same problem with the use of e-cigarettes among teenagers, banning their sale on a provincial basis between 2015 to 2017 and nationally in May 2018. Canada also has data of e-cigarette use from before these laws went into place, making for a natural cause and effect experiment, reported in JAMA Pediatrics.
The analysis looked at the differences in the use of e-cigarettes by people younger than 18 or 19 in provinces with and without the ban; the key assumption, motivation to use these vaping devices, was the same or similar across them all. The study made use of nationwide biennial surveys on tobacco, alcohol and drug use in Canadians over the age of 15. [1] It provided data of use, source of vaping products and harm perception. Since...