10 agosto 2015
The severity of drunk driving within a state is not the most important predictor of whether states adopt new laws to restrict drunk driving — nor is the political makeup of the state government. Instead, a study shows, the two strongest predictors of states adopting their first drunk driving laws were having a large population of young people and a neighboring state with similar driving laws.
http://www.sciencedaily.com/releases/2015/08/150810110903.htm
