Alice and Bob consume only two goods, X and Y . They can trade only with each other and there is no production. The total endowment of good X equals the total endowment of good Y. Alice's utility function is UA(xA,yA) = min{xA,yA} and Bob's utility function is UB(xB,yB) = max{xB,yB}. In an Edgeworth box, what would be the set of all Pareto optimal allocations?