Warning Labels

Do warning labels really work?

Consider this pack of Gauloises that I saw on a bench at a nearby dock. It notes that smoking not only kills — quit now! — but also increases the risk of blindness. And to make the point visually, the pack features a large blind eye.

But did the warnings stop the smoker from buying the pack of Gauloises, or cause him to quit the habit that could blind and kill him? Nope! So what did the warnings accomplish, really?