National Retail Sales of Alcohol and Cannabis During the COVID-19 Pandemic in Canada James MacKillop, PhD; Alysha Cooper, MSc; Jean Costello, PhD JAMA Network Open, 2021, 4, (11), e2133076, 1-4. Doi : 10.1001/jamanetworkopen.2021.33076   Introduction There is concern that the societal consequences of the COVID-19 pandemic will be associated with increased substance use.1 Data to date have primarily been self-reported changes, but objective sales data may inform this question. Here, we examined national retail sales of alcohol and cannabis prior to and during the pandemic in Canada. Methods : Where applicable, the report for this economic evaluation is consistent with the Consolidated Health Economic Evaluation Reporting Standards [...]