E-cigarette – causing negative or positive externalities?

BBC: 'Ban E-cigarette use indoors,' says WHO Article published: Aug 26, 2014 - out of date: no longer suitable for your IB Economics commentary IB Economics syllabus: Section 1, Microeconomics While it is pretty obvious that cigarettes cause negative externalities of consumption, what about e-cigarettes? An interesting article if you are into market failure, health regulations, [...]