Bretteville-Jensen, Anne Line; Jacobi, Liana - Institute for the Study of Labor (IZA) - 2008
importance of previous cannabis use, proneness and accessibility factors on hard drug initiation and to explore potential policy … proposed in the literature, our model allows for a constant and a heterogeneous effect of previous cannabis use on hard drug … previous cannabis use contribute to the observed higher drug use pattern among cannabis users. The latter has the largest …