>Again, that has not been the case when decriminalization of drugs has happened in other places. I doubt this to be true. Illegality has some effect on the am

>Again, that has not been the case when decriminalization of drugs has happened in other places. I doubt this to be true. Illegality has some effect on the amount and number of users. Personally, I don't touch the stuff for a variety of reasons, of which one is illegality which leads to having to deal with drug dealers. If it were legal (or decriminalised), it would increase the chances of me coming across it at a party or similar. At the margin this would have some effect on usage. The problem with trying to do before/after studies is the patchy data, usually filled in by statistical sampling which leads to error margins. It's pretty easy to determine how much alcohol is consumed per year, because of the status of the industry you can work it out from the sales (the amount of home-brewed hooch wouldn't even been a rounding error). In any case like this, with very large data sizes (ie, a big chunk of the adult population), any change in the legal status will have an effect at the margins. Hard-core and even regular users will not be affected by the legal status - but on the margin there will be plenty of people who might be inclined to take the occasional puff but don't because of constricted supply and the fact that it is illegal. Remove this and usage will go up - the degree is unknown and probably unknowable - but it will be there. Any change in the law changes the future, and especially so in this case. I'm not really arguing for or against here, just pointing out that usage will go up, and nobody knows exactly what that will mean.