Stephen Dubner wonders whether the Vatican's 10 Commandments for Driving might prompt an analogue to the Peltzman effect, and make these drivers take more risks because they feel more protected.

I assert that this wasn't necessary. I grew up a fundie Christian. I had observed as early as about age 17 that the stronger a driver's faith was, the more reckless was their driving.

Pronouncements from the Vatican aren't necessary for this particular effect, it seems - just a firm, unshakable belief in the afterlife as a better place.