Before revision: The following formula was created by Rabin to model utility to include fairness: Ui(ai, bj, ci) = πi(ai, bj) + ʄj (bj, ci) * [1+ƒi(ai, bj)].
After revision: The following formula was created by Rabin to model utility to include fairness: Ui(ai, bj, ci) = πi(ai, bj) + ƒj (bj, ci) * [1+ƒi(ai, bj)].