I hope this link works. http://www.indiana.edu/~engs/cbook/chap11.html
In any case it is a study showing that that lowering the age that makes it legal to buy alcohol substantially increases motor vehicle accidents involving alcohol, and increase the rate of fatal motor vehicle accidents. There's your reason not to lower the drinking age.
Lori M
Which is only part of the issue.
Binge drinking on campus and at private parties is another. Traffic accidents are people driving home from bars and clubs, binge drinking, and all of the accidents and dangers that come with that are another. That is the aspect of this that the University professors are aiming at.
Now as for the study, there are a couple major problems with any such study. A change in the law means a period of adjustment. When you lower it you suddenly have a large group of people that were not able to drink in public, but now are. There is bound to be some problems until the law "settles".
It is also stating a increase in accidents for that age group, but fails to compare accidents in that age group to accidents in other age groups. It doesn't look like it makes a causal connection between the age, rather then just alcohol in general.
Banning alcohol served in public places altogether would likely reduce DUI occurrences substantially, and as a result auto fatalities. But, as history tells us, that leads to all sorts of other problems. Of course if you only look at the pieces that support your desired result...
Lower aage limit will increase DUI occurrences, that is a given, you have more people on the road that are allowed to drink, or more importantly more people on the road allowed to go into bars and clubs. But whether or not a higher or lower drinking age increases or decreases safety across the board is a more difficult issue then just looking at traffic stats.