Which is to say that there are least two factors (scarcity and lack of transparency) artificially inflating pricing.
On the other hand, in a truly free market for tobacco, a pack of American Spirits might only cost a buck or two; nicotine is our one and only drug-war success, and I think the state has demonstrated that it can extract profits from vice goods if it wants to.
You'd still pay $75 (is that the right price?) for an 1/8 if that was the only legal way to do it, even if you could get it illegally for $30. At least, I would.
It's only in a dynamic analysis that the "enforced" part comes into play, usually because it is easier to get around artificial scarcity than discover new resources (natural scarcity).
After some arguing and googling "weed smells like pine", he came down from his paranoia perch and relaxed.
There was a news report in the UK a while ago about people adding glass (or something like), IIRC it was well substantiated.
Say the dealer laces his pot so a twelfth of an ounce actually weighs an eighth. Unless the additive somehow plumped up the pot's volume, the buyers would look at it and say 'you're ripping me off - that's a really light eighth.'
Sure, the dealer could then bust out some scales, but that would be weird. Not to mention dealers love repeat customers and glass in the mix would put an end to that quick.
http://www.canadianbusiness.com/after_hours/opinions/article...
If its legalized, it can still generate vasts sums of tax revenue. Look at how much tax money tobacco and alcohol bring in.
The issue you mentioned regarding taxation applies to both tobacco and alcohol as well - you can grow your own tobacco and make your own alcohol. Many people who smoke marijuana may have no interest in growing their own - the same way many tobacco smokers don't grow their own. Although, the point could be made that marijuana is probably a much easier plant to grow.
Furthermore, legalization does not necessarily allow people to grow for the purpose of selling. For example, it is legal to make alcohol for personal consumption but illegal to sell it.
Within a few years, though, they'd probably catch on that they can accomplish the same means via more traditional trusts and regulatory capture. They'll have to, before the market price drops through the floor, killing off their revenues.
Not throwing advocacy one way or another, just an observation on the cartels' likely follow-up response.