Despite the claimed result, limiting food stamp food choices is a failure.
These differences are statistically meaningless.
“Most encouraging for those concerned about reversing the childhood obesity epidemic were the observed differences in the proportion of obese children. After the changes in WIC programming, there was a 6% decline in obesity among 1 year-olds, from 15.1 to 14.2%, and 3% among 2-4 year-olds, from 14.6 to 14.2%.” [EurekAlert]
There is no definition of obesity for children – any study which reports this is simply junk!