Collecting better cannabis data is useful, but should allow for the possibility to study dynamics in cannabis use both along the extensive as well as the intensive margin.

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Keywords Age of onset, Cannabis legalization, Cannabis supply, Cannabis use, Data collection, Dynamics in cannabis use
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Journal Addiction
van Ours, J.C. (2017). Data on cannabis use now that legalization is gaining momentum. Addiction (Vol. 112, pp. 1138–1140). doi:10.1111/add.13769