Argument: Companies focus on profits, so will not voluntarily list calories
Matthew Yglesias. "Calorie Labeling and the Dunch Problem." July 15th, 2009: "you’ll hear a libertarian argument to the effect of, 'if people really wanted to know this stuff the market would respond automatically' which I think you’d have to say was naive at best. I do think that part of the key to making this have the desired effect is to be crude and obvious with the labels:"