Samenvatting
Zylman has challenged the conclusion that the change in the legal drinking age in Michigan on 1 January 1972 led to an increase in the number of young drivers involved in alcohol-related collisions. The other authors content that Zylman's analysis of the data is misleading and that a more reasonable interpretation of the data all leads to a confirmation of the original hypothesis, which is that the lowering of the drinking age led to an increase in alcohol-involved fatal collisions among young drivers. A response of Zylman is added.