In my face-to-face class we read a chapter about obesity in the book The Economics of Public Issues. But the article titled A Few Extra Pounds Might Bring Extra Years discusses some research that says that being underweight might be worse than being overweight. Here is an exerpt from the article:
"Compared to normal-weight people, those who were underweight were 70 percent more likely to die and those who were extremely obese were 36 percent more likely to die..."
But "that doesn't mean that people in the normal weight range should try to put on a few pounds," according to one of the researchers. Being obese means your body mass index (BMI) was 30 and above. Here is a Body Mass Index Chart based on height and weight