Revisiting drug progression: Long-range effects of early tobacco use

https://www.researchgate.net/publication/7631634_Revisiting_drug_progression_Long-range_effects_of_early_tobacco_use

Abstract: Drug progression models have been a cornerstone of scientific and public policy discussions for decades. These models have been criticized for their lack of causal mechanisms leading to drug dependence. Future research should focus on identification of pathways and covariates.