I should also point out that at least for the laying hens, the Welfare Footprint Project strived to be conservative in their assumptions so as not to inflate the benefits of reforms. You can read about the exact ways they were conservative it in chapter 9, starting with “The empirical estimates presented here are conservative” on page 10. I haven’t examined the book on broilers but I assume that the same approach was taken.
I should also point out that at least for the laying hens, the Welfare Footprint Project strived to be conservative in their assumptions so as not to inflate the benefits of reforms. You can read about the exact ways they were conservative it in chapter 9, starting with “The empirical estimates presented here are conservative” on page 10. I haven’t examined the book on broilers but I assume that the same approach was taken.