Nutty about the alcohol purchase age

CloseUp tonight (24 October) featured David Nutt on New Zealand's alcohol reforms. In the clip below, he says that New Zealand's lowering of the drinking age [actually, the alcohol purchase age] provides example of the increased harms and increased traffic accidents that eventuate.

Here is the best evidence we have on the effect of lowering the alcohol purchase age on traffic accidents.

It is hard to see evidence of substantial harm consequent to New Zealand's lowering of the alcohol purchase age from 20 to 18.