Items where Author is "Petry, N. M."
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Jofre-Bonet, M. & Petry, N. M. (2008). Trading apples for oranges? Results of an experiment on the effects of Heroin and Cocaine price changes on addicts' polydrug use. Journal of Economic Behavior & Organization, 66(2), pp. 281-311. doi: 10.1016/j.jebo.2006.05.002