The utility possibilities frontier shows the levels of satisfaction that each of two people achieve when they have traded to an efficient outcome on the contract curve. Points E,F,and G correspond to points on the contract curve and are efficient.Point H is inefficient because any trade within the shaded area will make one or both people better off.The utility possibilities frontier shows the levels of satisfaction that each of two people achieve when they have traded to an efficient outcome on the contract curve. Points E, F, and G correspond to points on the contract curve and are efficient. Point H is inefficient because any trade within the shaded area will make one or both people better off