In our strictest test for the effects of other unobserved social trends, Table 4 presents a similar set of analyses using the sample of respondents coming of age within two years of a law change. Columns one and two describe regression results predicting current alcohol use disorders, and columns three and four pertain to overall substance use disorders. In each pair of regressions, both the ‘short’ and ‘long’ models give estimates that are very similar to the estimates in Tables 2 and 3 using the full sample..
