I was not asserting that rationality is all that you need to make the most efficient group, if that was what you are getting at.
I think we agree that starting with groups A and B both with x skills if group A is more rational it will also be the more effective group.
My argument was as the ability of the group to act rationally increases, the utility difference between being a member and being the leader will decreases as the group becomes better at judging the leaders value.
The group trait required is not rationality—it is other traits that also share positive affect.
I was not asserting that rationality is all that you need to make the most efficient group, if that was what you are getting at.
I think we agree that starting with groups A and B both with x skills if group A is more rational it will also be the more effective group.
My argument was as the ability of the group to act rationally increases, the utility difference between being a member and being the leader will decreases as the group becomes better at judging the leaders value.