a portfolio approach does more good given uncertainty about the moral weight on animals
No, this is totally wrong. Whatever your distribution of credences of different possible moral weights of animals, either the global health charity or the animal welfare charity will do more good than the other, and splitting your donations will do less good than donating all to the single better charity.
Risk aversion doesn’t change the best outcome from donating to a single charity to splitting your donation, once you account for the fact that many other people are already donating to both charities.
Given that both orgs already have many other donors, the best action for you to take is to give all of your donations to just one of the options (unless you are a very large donor).
No, this is totally wrong. Whatever your distribution of credences of different possible moral weights of animals, either the global health charity or the animal welfare charity will do more good than the other, and splitting your donations will do less good than donating all to the single better charity.
This is why I said risk aversion matters—see this for a detailed explanation. Or see the back and forth with quila that inspired me to post it
Risk aversion doesn’t change the best outcome from donating to a single charity to splitting your donation, once you account for the fact that many other people are already donating to both charities.
Given that both orgs already have many other donors, the best action for you to take is to give all of your donations to just one of the options (unless you are a very large donor).
Yes, my response is from the perspective of the EA movement rather than any individual