Forbes.com is featuring a fascinating op-ed about cannabis use as compared to alcohol, and presents research that suggests that increased cannabis consumption would lead to decreased alcohol consumption and a positive net value for society. From the article (emphasis ours):
Reviewing the evidence in the Journal of Policy Analysis and Management, Montana State University economist D. Mark Anderson and University of Colorado economist Daniel Rees find that “studies based on clearly defined natural experiments generally support the hypothesis that marijuana and alcohol are substitutes.” Increasing the drinking age seems to result in more marijuana consumption, for instance, and pot smoking drops off sharply at age 21, “suggesting that young adults treat alcohol and marijuana as substitutes.” Another study found that legalizing marijuana for medical use is associated with a drop in beer sales and a decrease in heavy drinking. These results, Anderson and Rees say, “suggest that, as marijuana becomes more available, young adults in Colorado and Washington will respond by drinking less, not more.”
That conclusion is consistent with earlier research in which Anderson and Rees found that enacting medical marijuana laws is associated with a 13 percent drop in traffic fatalities. That effect could be due to the fact that marijuana impairs driving ability much less dramatically than alcohol does, although the fact that alcohol is more likely to be consumed outside the home (resulting in more driving under its influence) may play a role as well.
Anderson and Rees note that UCLA drug policy expert Mark Kleiman, who co-wrote Marijuana Legalization and has been advising Washington’s cannabis regulators, recently described a worst-case scenario for legalization featuring an increase in heavy drinking, “carnage on our highways,” and a “massive” increase in marijuana consumption among teenagers. “Kleiman’s worst-case scenario is possible, but not likely,” they conclude. “Based on existing empirical evidence, we expect that the legalization of recreational marijuana in Colorado and Washington will lead to increased marijuana consumption coupled with decreased alcohol consumption. As a consequence, these states will experience a reduction in the social harms resulting from alcohol use. While it is more than likely that marijuana produced by state-sanctioned growers will end up in the hands of minors, we predict that overall youth consumption will remain stable. On net, we predict the public-health benefits of legalization to be positive.”
Read the full op-ed at Forbes.com by clicking here.