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Michael J. Armstrong

Michael J. Armstrong

The Conversation

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After Canada legalized cannabis, police caught more drunk drivers

After Canada legalized cannabis, police caught more drunk drivers

Police reported more drug and alcohol impairment after 2018. The growth seemed more due to enforcement changes and pandemic restrictions than to...

19.12.2025 6

The Conversation

Michael J. Armstrong

Alcohol sales changed subtly after Canada legalized cannabis

Total alcohol sales didn’t change much in the first 17 months after Canada legalized recreational cannabis, but small changes appeared at the local...

08.07.2025 10

The Conversation

Michael J. Armstrong

Cannabis retail expansion in Canada came with only a small uptick in the number of consumers

Increased usage among women and older adults during 2019-2023 seemed related more to falling prices than to the expanding number of stores.

01.04.2025 10

The Conversation

Michael J. Armstrong

Canada’s medical cannabis system changed but didn’t disappear after recreational legalization

When Canada legalized recreational cannabis use on Oct. 17, 2018, there were concerns about the potential impacts. Would it trigger greater...

16.10.2024 9

The Conversation

Michael J. Armstrong