If all need for blood is met regardless of your donation, your counterfactual impact should be 0. Would Shapley values agree? If it gives the same to everyone, it would mean everyone gets 0 impact.
See this other comment It depends on how you model it. If you model other donors as part of the environment (like e.g. the needle for drawing the blood), everyone gets 0. If you model each donor as an actor they all gettotalimpactnumberofactors. Nuno made http://​​shapleyvalue.com/​​ to play around with it
If all need for blood is met regardless of your donation, your counterfactual impact should be 0. Would Shapley values agree? If it gives the same to everyone, it would mean everyone gets 0 impact.
See this other comment
It depends on how you model it. If you model other donors as part of the environment (like e.g. the needle for drawing the blood), everyone gets 0. If you model each donor as an actor they all gettotal impactnumber of actors. Nuno made http://​​shapleyvalue.com/​​ to play around with it