A Key question in addiction studies is why do governments not readily
adopt policies that research shows to be effective in reducing harm? I
n this paper, it is argued that policy development can best be underst
ood as a political activity, which is not necessarily scientific. A de
scriptive model of policy analysis is illustrated by case examples fro
m alcohol and tobacco policy arenas. By understanding policy developme
nt as a process, it is suggested that policy advocates can match their
strategies to the stages of the process, and thus raise the probabili
ty that the advocated policy will be adopted.