Investigating the impact of extended bar closing times on police stops for DUI

Researchers have often studied whether changes in the availability of alcohol impact associated problem behaviors like drunk driving. In July of 2003, the state of Minnesota approved legislation to extend by one hour the closing time for eating and social establishments that serve alcohol. This study utilized a time-series model to examine the impact of the extended closing time on the number of police stops for DUI in one jurisdiction in Minnesota. While results of the time-series indicated that there was a significant increase in the number of police stops for DUI following this legislative change, incident-specific analyses suggested that this increase might have been largely a result of increased proactive responses by local police. Implications and suggestions for future research are discussed.