Quote:
"One possible measure of addictiveness is the degree to which use continues after initial experimentation. High continued use rates do not necessarily suggest addiction; if people who consume a good find they like it and therefore consume it frequently, the continued use rate is high even if there is no addiction. But addiction does not imply high continued use rate, and this has been used frequently as a measure of addiction."
"The fact that continued use rates for marijuana, which is not regarded as physically addictive, are similar to those for crack, which is regarded as highly addictive, also challenges the more extreme claims about addictiveness of drugs. Likewise, the continued use rates for other legal goods (e.g., chocolate, caffeine) are perhaps even higher."
-Jeffrey Miron, Drug War Crimes: The Consequences of Prohibition