This paper assesses whether school lunches contribute to childhood obesity. I employ two methods to isolate the causal impact of school lunches on obesity. First, using panel data, I ?nd that children who consume school lunches are more likely to be obese than those who brown bag their lunches even though they enter kindergarten with the same…

Childhood obesity has emerged as a critical health problem of the 21st century. The seriousness of this issue stems from the grave health consequences of overweight and obesity that begin in child-hood and persist later in life. In light of these consequences, public health officials and others have begun to focus on schools as key settings in…