In the years from 15 to 24, young Americans begin earning their own money, form lasting buying habits, often set up their own families, and — most important to Detroit's automakers —usually buy their first car. Detroit has always been a youth watcher, but it is now on the greatest youth kick ever.
One reason: most youngsters start off with a used car, but frequently remain loyal to the first make when they trade up to a new car. And today, with greater buying power of their own and parents who are more generous, more youngsters than ever start right...