But something that works for a multiparty system does not necessarily translate well to a system with less candidates (or viable candidates). To be honest it can be argued that obama would have won by a much larger margin in america given that 16/17 year olds could vote, and though this could probably show a good thing most people that age do not understand the government nor any policy action that would be put in place by there vote. At 18 there is already some trouble in my opinion especially seen by such ad campaigns as vote or die, or teenagers coming on tv saying I'm voting for so and so because they are more handsome etc.. you find this much less in older age groups.