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People check out the hydroponic plant growing system in the weGrow marijuana cultivation supply store during its grand opening March 30, 2012 in Washington, DC.
The medical marijuana industry may have suffered a blow with the ban on dispensaries in Los Angeles, but the movement to decriminalize marijuana has been gaining momentum in several other states. This fall, voters in Colorado, Oregon and Washington will decide whether to allow recreational marijuana use.
Here with more is Jonathan Caulkins, co-author of "Marijuana Legalization: What Everyone Needs to Know." He also teaches public policy at Carnegie Mellon.
Caulkins expects the black market will be able to absorb any patient demand. No one knows what the market share of dispensaries is in California, but the bulk of it is still Mexican, commercial-grade import.
Jonathan Caulkins, co-author of "Marijuana Legalization: What Everyone Needs to Know," and teaches public policy at Carnegie Mellon.