Epidemiology of binge drinking
Concerns over binge drinking by teenagers has led to a review of liquor advertising being announced by the New Zealand government in January 2006. The review considered regulation of sport sponsorship by liquor companies, which at present is commonplace. Previously the drinking age in New Zealand was 20, then dropped to 18 in 1999.
Alcohol laws of Wisconsin
The drinking age in Wisconsin is 21. Those under the legal drinking age may be served, possess, or consume alcohol if they are with a parent, legal guardian, or spouse who is of legal drinking age. Those age 18-20 may also be served, possess or consume alcohol if they are with a parent, legal guardian, or spouse who is of legal drinking age. 
Those age 18 to 20 may also possess (but not consume) alcohol as part of their employment.