The ways people can access and buy medical and legal cannabis differs across jurisdictions. In Canada and many US states, recreational cannabis can be purchased from retail stores and online. Other jurisdictions have less commercialized markets, with access from homegrow, ‘social clubs’, or more restricted retail sources like pharmacies.
How does the retail structure affect prevalence and patterns of use? Does higher retail store density lead to greater use? How do cannabis prices changes in legal markets? How many consumers transition from ‘illegal’ to legal retail sources after legalization?
Recent papers
Distribution of legal retail cannabis stores in Canada by neighbourhood deprivation.
Fataar F, Driezen P, Owusu-Bempah A, Hammond D.
Journal of Cannabis Research 2024; 6(1):5.
Wadsworth E, Rynard V, Driezen P, Freeman TP, Rychert M, Wilkins C, Hall W, Gabrys R, Hammond D.
Harm Reduction Journal 2023; 20(1): 19.
Wadsworth E, Fataar F, Goodman S, Smith D, Renard J, Gabrys R, Jesseman R, Hammond D.
BMC Public Health 2022; 22(1):2048.
Home cannabis cultivation in the United States and differences by state-level policy, 2019-2020.
Wadsworth E, Schauer GL, Hammond D.
The American Journal of Drug and Alcohol Abuse 2022; 48(6):701-711.
Self-reported impact of the COVID-19 pandemic on cannabis use in Canada and the United States.
Wadsworth E, Goodman S, Hammond D.
Journal of Psychoactive Drugs 2022; 55(4):483-492.
Hammond D, Goodman S, Wadsworth E, Freeman TP, Kilmer B, Schauer G, Pacula RL, Hall W.
International Journal of Drug Policy 2022;105:103716.
Goodman S, Wadsworth E, Hammond D.
Journal of Studies on Alcohol and Drugs 2022; 83(3):392-401.
Home cultivation across Canadian provinces after cannabis legalization.
Wadsworth E, Cristiano N, Pacheco K, Jesseman R, Hammond D.
Addictive Behaviors Reports 2022; 15:100423.
Wadsworth E, Driezen P, Dilley JA, Gabrys R, Jesseman R, Hammond D.
Journal of Studies on Alcohol and Drugs 2023; 84(6):852-862.
Wadsworth E, Driezen P, Chan G, Hall W, Hammond D.
The American Journal of Drug and Alcohol Abuse 2022;48(2):195-205.
Cannabis flower prices and transitions to legal sources after legalization in Canada, 2019-2020.
Wadsworth E, Driezen P, Pacula RL, Hammond D.
Drug and Alcohol Dependence. 2022; 231:109262.
Retail availability and legal purchases of dried flower in Canada post-legalization.
Wadsworth E, Driezen P, Hammond D.
Drug and Alcohol Dependence; 2021; 225:108794.
Consumer perceptions of ‘legal’ and ‘illegal’ cannabis in US states with legal cannabis sales.
Fataar F, Goodman S, Wadsworth E, Hammond D.
Addictive Behaviors 2020; 112:106563.
Wadsworth E, Dreizen P, Goodman S, Hammond D.
Addiction Research & Theory 2020; 28(6):474-483.
Out-of-state cannabis purchases in the United States.
Wadsworth E, Hammond D.
Drug and Alcohol Dependence 2019; 207:107822.
Retail price and availability of illicit cannabis in Canada.
Mahamad S, Hammond D.
Addictive Behaviours 2019;90:402-408.
