don't let your teen own their own car

From World, citing an article by researchers at Children's Hospital of Philadelphia in October's issue of Pediatrics...

...one quarter of all teen drivers who have their own car have been in an automobile accident while driving. Only 10% of teens who shared their vehicle with another family member have crashed the car.

I wonder how the numbers would look for teen car owners who bought their own-- vs. being given it by mommy or daddy. I'll bet that makes a difference!