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.
National Minimum Drinking Age Act
Several studies, including a 2011 review, were found to disprove the idea that raising the drinking age to 21 actually saved lives in the long run. For example, Miron and Tetelbaum (2009) found that when the federally coerced and non-coerced states were separated out, any lifesaving effect is no longer statistically or practically significant in the coerced states, and even in the voluntary-adopting states the effect does not seem to last beyond the first year or two. They also find that the 21 drinking age appears to have only a minor impact on teen drinking. There is also some evidence that traffic deaths were merely shifted from the 18-20 age group to the 21-24 age group rather than averted. Additionally, Canada, Australia, the UK, and several other nations saw similar or faster declines in traffic fatalities than the USA did since the early 1980s despite not raising their drinking ages to 21. Thus, the magnitude of any public health and safety benefits of the 21 drinking age, at least relative to a legal drinking age of 18, remains unclear.