Fast food is not good for us. That's not exactly a secret.
Nutritionists point to all that fat and salt in fast food as one of the main causes of the growing obesity rate in this county, and elsewhere around the world.
There's a commonly held belief that poor people eat more fast food than any other group.
University of Michigan-Dearborn Economics Professor Patricia Smith decided to test that belief in a study on fast food consumption. She found that the poor don’t actually eat more fast food than anyone else. It is those who are busiest, often the middle class, that do.