Our Say: Fast-food ad ban not an answer to youth obesity

Childhood obesity grew steadily from the 1980s until it leveled off recently. The Centers for Disease Control and Prevention estimate that about a third of American kids are overweight or obese.

Why? Fingers have been pointed in many directions - to the rise of video games and computers as sedentary forms of recreation, to cutbacks in school physical education programs, and to lack of instruction on nutrition.

Three college researchers, in a study being published this month in The Journal of Law and Economics, provide at least some evidence pointing to another of the usual suspects: the barrage of fast-food...