Separating the Market for Illicit Drugs
The Netherlands follows a policy of separating the market for illicit drugs. Cannabis is primarily purchased through coffee shops. Coffee shops offer no or few possibilities for purchasing illicit drugs other than cannabis. Thus The Netherlands achieve a separation of the soft drug market from the hard drugs market - and separation of the 'acceptable risk' drug user from the 'unacceptable risk' drug user.
Abraham, Manja D., University of Amsterdam, Centre for Drug Research, Places of Drug Purchase in The Netherlands (Amsterdam: University of Amsterdam, September 1999), pp. 1-5.