Drinking age is 19 for most of Canada.
It appears that Canadian students generally experience fewer alcohol-related problems (X=2.25) than do American students (X=3.30). In addition, across the two samples, Roman Catholic (X=2.61) and Protestants allowed to drink (X=2.56) suffer more problems than do Protestants not allowed to drink (X=2.25), who in turn experience more problems than do their Jewish counterparts (X=1.72).
Again, the interaction of Country and Religious Affiliation serves to explain the two main effects, and is shown in Fig. 2. Interestingly, American students experience more alcohol-related problems than Canadian students regardless of the religion in