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Numerous employers in over 20 U.S. states currently discriminate legally against smokers in their hiring policies. We analyze the cost of being a smoker, measured in annual hospital days, and compare this with the cost of being a former smoker, the cost of being obese, and the cost of a variety of other medical conditions, relative to the cost of being a never smoker, using three large recent surveys each having in excess of one hundred thousand observations. The paper also explores the cost of former smokers as determined by the number of years since quitting. Smokers as a whole are not found to be the most costly employees. Furthermore, health costs vary dramatically among smokers of different duration and intensity. As a consequence, our results question the efficiency of such discrimination. (JEL I10, I18, J71, J7)

BACKGROUND: Choice of minimum legal age (MLA) for cannabis use is a critical and contentious issue in legalization of non-medical cannabis. In Canada where non-medical cannabis was recently legalized in October 2018, the federal government recommended age 18, the medical community argued for 21 or even 25, while public consultations led most Canadian provinces to adopt age 19. However, no research has compared later life outcomes of first using cannabis at these different ages to assess their merits as MLAs. METHODS: We used doubly robust regression techniques and data from nationally representative Canadian surveys to compare educational attainment, cigarette smoking, self-reported general and mental health associated with different ages of first cannabis use. RESULTS: We found different MLAs for different outcomes: 21 for educational attainment, 19 for cigarette smoking and mental health and 18 for general health. Assuming equal weight for these individual outcomes, the 'overall' MLA for cannabis use was estimated to be 19 years. Our results were robust to various robustness checks. CONCLUSION: Our study indicated that there is merit in setting 19 years as MLA for non-medical cannabis.