X i =diag( X i1 , X i2 ) is the 2 m matrix of auxiliary variables, m=m 1 +m 2 where m k is the number of explanatory variables for category k , and X ik =(x ik1 ,x ik2 , ,x ikmk ) is the set of observations corresponding to area i and category k, k=1, 2
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The research revealed that although teens were well-acquainted with the negative effects of tobacco use, they did not consider smoking a significant issue in the context of their lives (Hicks, 2001)
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"This level of misinformation is an enormous barrier to actually accomplishing tobacco-harm reduction because if people believe that the products have equal risk, there's not a real incentive." The program is funded through Rodu's research money, which includes grants from the tobacco industry