Thanks for highlighting that, Blake! I estimated the welfare per time as a fraction of the welfare range for a hen in a conventional cage and barn egg production (cage-free aviary) are −3.83 and −1.17 times that of a random human. So my (speculative) assumption that the welfare per time as a fraction of the welfare range for a hen in organic egg production equals that of a random human implies the difference between the welfare per time of a hen in organic and barn egg production is 81.6 % (= (1 + 1.17)/(-1.17 + 3.83)) of the difference between the welfare per time of a hen in barn egg production and a conventional cage. In other words, I am (implicitly) assuming the improvement from going from barn to organic egg production is 81.6 % that from going from a conventional cage to barn egg production. This sounds reasonable to me, but it is hard to tell. It would be nice to have data from WFP.
There might be less variation in the cost-effectiveness of animal welfare interventions than in global health and development.
The variation in the cost-effectiveness of animal welfare interventions might be similar to that in global health and development.
There are uncertainties as you pointed out, and my original sentence was referring to a previous version of the post where I had estimated buying organic instead of barn eggs was 279 times as cost-effective as corporate campaigns (instead of 714 as published in the post).
Thanks for highlighting that, Blake! I estimated the welfare per time as a fraction of the welfare range for a hen in a conventional cage and barn egg production (cage-free aviary) are −3.83 and −1.17 times that of a random human. So my (speculative) assumption that the welfare per time as a fraction of the welfare range for a hen in organic egg production equals that of a random human implies the difference between the welfare per time of a hen in organic and barn egg production is 81.6 % (= (1 + 1.17)/(-1.17 + 3.83)) of the difference between the welfare per time of a hen in barn egg production and a conventional cage. In other words, I am (implicitly) assuming the improvement from going from barn to organic egg production is 81.6 % that from going from a conventional cage to barn egg production. This sounds reasonable to me, but it is hard to tell. It would be nice to have data from WFP.
@Blake Hannagan, I have now updated the sentence above to:
There are uncertainties as you pointed out, and my original sentence was referring to a previous version of the post where I had estimated buying organic instead of barn eggs was 279 times as cost-effective as corporate campaigns (instead of 714 as published in the post).