Basically this says that decision symmetry and IIA are incompatible because the definition of “symmetry” depends “irrelevant alternatives”. Yes?
In a way.
But as I said, you don’t actually need symmetry to break IIA (non-dictatorship should be enough); it’s just that there is an easy picture proof for symmetry.
Basically this says that decision symmetry and IIA are incompatible because the definition of “symmetry” depends “irrelevant alternatives”. Yes?
In a way.
But as I said, you don’t actually need symmetry to break IIA (non-dictatorship should be enough); it’s just that there is an easy picture proof for symmetry.