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. Author manuscript; available in PMC: 2016 Oct 1.
Published in final edited form as: Drug Alcohol Depend. 2015 Aug 21;155:90–96. doi: 10.1016/j.drugalcdep.2015.08.009

Figure 2.

Figure 2

a: Hazard rates of initiating marijuana use for females ages 8-17 by ethnicity and region. These functions show the probability that a respondent would initiate marijuana use at age j, given that he or she had not been intoxicated before age j.

b: Hazard rates of initiating marijuana use for males ages 8-17 by ethnicity and region

Notes: W=White; AI=American Indian; NP=Northern Plains; SW=Southwest; UGL=Upper Great Lakes. Non-signficant coefficients for UGL and male*UGL were not used to calculate the hazard rates in Figures 2a and 2b.