NPR (I think Planet Money) made an episode on that few months ago about that. They've mentioned backup cameras don't make economic sense, but something along lines "if you run over your child a lot more dies" was said...
While they don’t make economic sense perhaps, they make strong functional sense. I was always proud of my ability to back into spots, but even I have to admit they make backing up a million times easier. I don’t want one for the safety, I want it for the convenience.
