The sources I had for the effects of Prohibition on consumption were academic journal articles on paper that I can't now get at. It's remarkably difficult to find an on-line source for such a simple piece of information as estimates of US per capita alcohol consumption over time. There is an easily available table of taxed consumption over time, which obviously doesn't address the point. The link I gave does a good job of shredding the myth that Prohibition was an exceptionally violent period.

I did come across some rather telling secondary sources, though. The American far right (of the Friedmanite and soi-disant "libertarian" persuasion) is scared shitless of the idea that government regulation might ever work. They have a few discussion papers which implicitly accept that, prima facie, the facts suggest that Prohibition did in fact significantly cut overall alcohol consumption and make a large improvement in public health, and then proceed to generate billowing ideological smokescreens to say why you shouldn't believe the obvious facts. So, somehow, they got hold of the same data I've seen.

The Cato Institute (one of the groups taking this line) is substantially funded by Coors.