I think one should rely on RP’s welfare ranges, but I believe the best animal welfare interventions would still be more cost-effective than the best in global health and development with your multipliers. These suggest the welfare ranges should be 0.258 % (= (1.5*10*10*100*1*10)^-0.5) as large. Adjusting my estimates based on this, corporate campaigns for chicken welfare would be 3.90 (= 2.58*10^-3*1.51*10^3) times as cost-effective as GiveWell’s top charities, and Shrimp Welfare Project’s Humane Slaughter Initiative would be 112 (= 2.58*10^-3*43.5*10^3) times as cost-effective as GiveWell’s top charities.
I think one should rely on RP’s welfare ranges, but I believe the best animal welfare interventions would still be more cost-effective than the best in global health and development with your multipliers. These suggest the welfare ranges should be 0.258 % (= (1.5*10*10*100*1*10)^-0.5) as large. Adjusting my estimates based on this, corporate campaigns for chicken welfare would be 3.90 (= 2.58*10^-3*1.51*10^3) times as cost-effective as GiveWell’s top charities, and Shrimp Welfare Project’s Humane Slaughter Initiative would be 112 (= 2.58*10^-3*43.5*10^3) times as cost-effective as GiveWell’s top charities.