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The Commonwealth Club of California held a discussion Wednesday night in San Francisco on the “Economics of Marijuana” and Proposition 19, the ballot initiative to legalize cannabis up to one ounce for those over 21.

Included in the discussion is Oaksterdam founder and co-sponsor of the initiative Richard Lee; Tim Rosales, the campaign manager for No on Prop. 19 and Beau Kilmer, the co-director for RAND Drug Policy Research Center. The program is moderated by the Oakland Tribune political and legal affairs reporter Josh Richman.