This report is based on a workshop of the same name that was co-organized by CCSA and the Department of Political Science at the University of Zurich. Held on February 8, 2021, the workshop was organized to exchange research experiences and encourage networking among international cannabis experts and researchers. 

Key findings:

• An international workshop with recognized cannabis researchers and policy experts from around the world was held online on February 8, 2021.
• The discussions focused on questions and issues related to the production of scientific evidence about the consequences of cannabis legalization and forms of regulation.
• Motives for legalizing or decriminalizing cannabis for recreational use vary according to different contexts and are reflected in different choices about regulatory measures.
• Researchers need to assess public health consequences in relation to product formats.
• There seems to be a tendency among regulators to favour commercial retail models to the neglect of middle-ground options.
• International cooperation among researchers and experts is required to meet the challenges of measuring consumption and implementing regulatory frameworks and legal models.
• Gathering data before and after policy changes is essential in evaluating their impact.
• The use of comparable indicators across jurisdictions is important to ensure that knowledge can be shared across jurisdictions.