There are a couple of things funny with this new formula and the researcher's thinking right off the bat. First of all, it's sexist. The formula *only* looks at the mother's employment and/or work habits because hey, it's still the 1950's and only women make the meals for the family. No? No. Hell no. Whether or not mommy is home every night to make fresh-from-scratch home cooking isn't nearly as important as the genetic factor when it comes to being fat. But you can't control a person's genetics or analyze them easily, so the study goes for low-hanging fruit like the cooking thing, whether or not mom smoked during pregnancy, the parent's BMIs (at least that's something), number of people in the household and the baby's birth weight.
I was going to try and really dig deeper into this article but my brain fell out due to baby-induced exhaustion, so instead I bring you my convo with Fat Fox about it: