The peer-reviewed study, entitled “US Cannabis Laws Projected To Cost Generic And Brand Pharmaceutical Firms Billions”, analyzed how publicly traded pharmaceutical firms fared after adult-use or medical marijuana laws were enacted by states. According to Ziemowit Bednarek, California Polytechnic State University’s Finance Department, together with Sarah Stith, pharmaceutical stocks were worth 1.5-2% lower in only 10 days following cannabis legalization.