The goals of this chapter are three-fold: (1) to outline some broad empirical regularities concerning how drug problems evolve over time, (2) to sketch some plausible mechanisms for ways in which aspects of that variation might be endogenous, and (3) to review two classes of dynamic models of...

Various jurisdictions are legalising not just cannabis possession and use, but also large-scale commercial production, distribution and sale. Potential problems with that form of legalization raise questions about how best to implement a legalisation. This paper analyses the interests of the...